The Blind Pupil's Kekkei Genkai

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Sakura Haruno and Kakashi Hatake have been married for several years. They haven't talked about offspring yet but sakura wants them. One day an orphan boy is brought into the hospital and Tsunade, the hokage, has sakura tend to him. His eyes were damaged and he ends up blind, but Tsunade wants kakashi and sakura to train him because he has a special kekke genkai.

Chapter 1: The Boy Who Vanished Under the Knife

The chakra lamps hummed their low, constant dirge, casting a pale blue glow over the operating theater that made the blood on the tiles look black. Sakura's hands moved on instinct, fingers slick with someone else's life, pressing and weaving and praying to gods she'd stopped believing in years ago.

"BP's dropping. Sixty over forty."

"I see it." Her voice came out flat, clinical. The way it always did when things went sideways. "Push another unit of whole blood and get me a chakra patch on that lateral wound."

The boy on the table couldn't have been more than twelve. Small for his age, the way malnourished kids always were. His black hair was matted with sweat and something darker, something that smelled like burnt copper. And his eyes—

Sakura forced herself to look. To really look.

The sockets were shredded. Whatever jutsu had done this, it hadn't been clean. The tissue was ragged, torn, like someone had tried to scoop out the contents with a dull spoon and given up halfway through. Blood wept from the wounds in slow, steady pulses that matched his heartbeat.

She'd seen worse. She'd seen much worse.

That didn't make it easier.

"Where's the attending?" she asked, not looking up from her work. Her chakra flowed from her palms in steady waves, cool and precise, knitting blood vessels back together one microscopic thread at a time.

"Trauma bay two. Multiple shinobi from the border patrol."

Of course. Because there were never enough hands, never enough hours, never enough of anything except the endless parade of broken bodies coming through these doors.

Sakura leaned closer to the boy's face, her chakra probing gently at the edges of the damaged tissue. She could feel the remnants of the jutsu still clinging to the wounds, crackling with a strange, unfamiliar energy.

"Someone get me a sample of this residue," she said. "And page Ino. I need a second opinion on the ocular damage."

The boy twitched beneath her hands.

Not a seizure. Something else.

His skin rippled. Actually rippled, like water disturbed by a stone, and then—

He was gone.

Sakura's hands closed on empty air. The monitors screamed. The nurses gasped. And then, just as suddenly, he was back, his small body solid again beneath her palms, his chest rising and falling in shallow, desperate breaths.

"What the hell was that?" someone whispered.

Sakura didn't answer. She was too busy trying to understand what she'd just felt. His chakra network was a mess—tangled and strange—but beneath the chaos, she'd caught a glimpse of something else. Something familiar.

A kekkei genkai.

She'd read about this one. Light manipulation. The ability to bend photons around the body, to become invisible, to—

"His eyes," she muttered. "They didn't attack him. They tried to harvest him."

The words hung in the air like a death sentence.

Sakura redoubled her efforts, pushing more chakra into the wounds, trying to salvage what she could. But the damage was too extensive. Too deliberate. Whoever had done this had known exactly what they were doing.

He flickered again. Visible.Invisible. Visible.

Each time he disappeared, her hands lost their grip. Each time he reappeared, she had to find her place again, re-establish the connection, start over.

"Come on," she breathed. "Come on, kid. Stay with me."

The monitors beeped their frantic rhythm. The chakra lamps pulsed overhead. And somewhere in the distance, she heard the muffled sounds of the other trauma bays—more wounded, more dying, more of the same endless war that had been bleeding Konoha dry for years.

She couldn't save his eyes. She knew that now. The tissue was too damaged, the optic nerves too shredded. Even with her skills, even with the best medical ninjutsu in the Five Nations, some things couldn't be undone.

But she could save his life.

Her chakra shifted, abandoning the delicate work of ocular reconstruction in favor of more fundamental repairs. Stop the bleeding. Stabilize the vitals. Keep the heart beating and the lungs breathing and worry about the rest later.

The boy flickered one more time, and this time when he reappeared, his hand shot out and grabbed her wrist.

Sakura froze.

His eyes—what was left of them—were pointed at her face. Sightless. But somehow, impossibly, seeing.

"Don't," he rasped.

"Don't what?"

"Don't... let them..."

His grip tightened, small fingers digging into her skin with a strength that shouldn't have been possible. His chakra surged, wild and uncontrolled, and for a moment, Sakura felt herself flickering too—her own body becoming uncertain, translucent, caught in the wake of his power.

Then the monitors flatlined.

"No." She yanked her hand free and slammed both palms onto his chest. "No, you don't. Not on my watch."

Green light flared. His heart stuttered, caught, restarted. His body solidified, his grip on her wrist loosening, his chakra settling back into something almost normal.

Sakura kept working. Minutes passed. Or hours. Time had stopped meaning anything.

When she finally stepped back, her hands shaking, her scrubs soaked with blood and sweat, the boy was alive. Unconscious. Blind.

But alive.

She stripped off her gloves with movements that felt mechanical, impersonal. Tossed them in the bin. Watched them disappear into the red plastic like they'd never existed.

"Get him to recovery," she said. "Full monitoring. I want someone in the room at all times."

The nurses moved to obey. Sakura turned away, already mentally cataloging the other patients who needed her attention, the other crises waiting to be solved.

She made it three steps before the ANBU appeared.

He materialized in the doorway like a ghost, his mask blank and white, his posture rigid with whatever urgency had driven him here.

"Haruno-sama. The Hokage requests your presence.Immediately."

Sakura stopped. Turned. Looked at the blood on her hands, the blood on the floor, the small, broken boy being wheeled away on a gurney.

"I'm in the middle of—"

"The matter is urgent."

"I have patients who are also—"

"The Hokage was explicit."

She stared at him. He stared back.

Something cold settled in her stomach. Something that had nothing to do with the air conditioning.

"What's happened?"

The ANBU didn't answer. His silence was worse than any words.

Sakura looked down at her hands one more time. Then she nodded, once, and followed him out the door.

The corridor stretched ahead of her, long and white and sterile. Behind her, the operating theater was already filling with the next wave of casualties. And somewhere in the village, in a tower that loomed over everything like a monument to all the things they'd lost and all the things they were still losing, her husband was waiting.

Waiting to tell her something she wasn't sure she wanted to hear.

She quickened her pace anyway.

The chakra lamps faded behind her, their blue glow swallowed by the harsh fluorescent lights of the hallway. And somewhere in the back of her mind, she could still feel the boy's chakra, tangled and strange and impossibly bright.

Still visible. Still fighting.

Just like her.

The fluorescent lights of the hospital corridor felt like a personal insult after the muted blue of the operating theater. Sakura walked fast, her boots squeaking against the linoleum in a rhythm that matched the pounding in her temples. The ANBU stayed half a step behind her, silent as a shadow, and she didn't bother trying to make conversation.

What was there to say? Hey, did you happen to notice if my husband is about to divorce me? No reason, just curious.

She could still smell the blood on her skin. Could still feel the ghost of that boy's chakra tangled around her fingers, strange and wild and impossibly bright. The way he'd grabbed her wrist. The way he'd looked at her without eyes and somehow still seen.

Don't let them.

Who was them? The people who'd done this to him? The village? Everyone?

The hospital doors slid open and the night air hit her like a slap. Cold for this time of year, the kind of cold that settled into your bones and stayed there. She pulled her coat tighter and kept walking.

Konoha after midnight was a different animal than the one she saw during the day. Quieter. Darker. The shops were shuttered, the streets empty except for the occasional patrol. Even the Hokage monument looked different in the moonlight—less like a symbol of pride and more like a row of silent judges watching everything that happened below.

Sakura didn't look up at it. She'd stopped looking up years ago.

The tower was lit from within, every window glowing amber against the dark sky. She took the stairs two at a time, ignoring the elevator, because standing still felt impossible right now. Movement meant forward progress. Movement meant she didn't have to think about what might be waiting for her at the top.

The ANBU peeled off at the third floor without a word. Sakura kept climbing.

By the time she reached the Hokage's office, her legs were burning and her lungs were tight and she was still no closer to understanding what the hell was happening. She pushed through the double doors without knocking, because she'd earned that much after fifteen years of bleeding for this village.

The first thing she noticed was the smell of sake.

The second thing she noticed was Kakashi.

He was leaning against the far wall, arms crossed, his mask still in place despite the hour. He looked tired in that way he'd perfected over the years—like he was half-asleep and fully alert at the same time. His visible eye tracked her entrance, and something flickered across his face when he saw her.

Blood on her sleeves. Blood on her hands. The antiseptic smell that clung to her like a second skin.

She crossed the room to stand beside him, close enough that their shoulders almost touched. Not quite. That distance had been growing for a while now, hadn't it? Small at first. Easy to ignore. Now she could fit a whole person in the space between them.

"Captain," she said.

"Sakura." His voice was exactly the same as it had always been. Low and lazy and hiding everything that mattered. "You look..."

"Like I just spent four hours elbow-deep in a twelve-year-old's eye sockets? Yeah. I know."

His eye crinkled. Almost a smile. Almost.

"What are we doing here, Kakashi?"

"Your guess is as good as mine."

They both looked at Tsunade. The Hokage was slumped behind her desk, a half-empty bottle of sake to her right, a folder to her left. She looked old tonight. Older than Sakura had ever seen her. The lines around her eyes seemed deeper, the set of her jaw more grim.

"I'm sure you're both wondering why I dragged you here at this hour," Tsunade said, not looking up from the papers she was reading. "The answer is simple. I need people I can trust."

Sakura felt something cold slide down her spine. "What's happened?"

Tsunade finally looked up. Her gaze moved between them, measuring, calculating. Whatever she was looking for, she seemed to find it.

"The boy you operated on tonight. Rai. No surname. No family. No records of any kind, except for a file at the border checkpoint that lists him as an unidentified minor crossing into Fire Country three months ago."

Sakura's stomach tightened. "The jutsu that injured him. It wasn't a battle wound. Someone did that to him on purpose."

"Yes."

"They were trying to harvest his kekkei genkai."

"Yes."

Kakashi shifted beside her, the barest movement, but she felt it. Felt the weight of his attention sharpening.

"He's blind now," Sakura said. "I couldn't save his eyes. But his chakra... whatever they did, it didn't completely destroy his ability. I felt it fighting me during the surgery. He was using it on the table."

Tsunade nodded slowly. "That matches what I've been told. The ability to manipulate light. To bend it. To become invisible. It's rare. Rare enough that certain people would kill for it."

She slammed the folder onto the desk with enough force to make the sake bottle rattle.

"Here's the situation. Rai is now blind, orphaned, and carrying a kekkei genkai that every black market organ dealer and missing-nin with half a brain is going to want to get their hands on. He has no family. No clan. No one to protect him."

Sakura already knew where this was going. She could feel it building in her chest, a pressure that was part dread and part something else. Something dangerously close to hope.

"He'll be placed in your custody," Tsunade said, her voice flat and final. "Both of you. You'll train him personally. You'll protect him. And you'll do it quietly, because the last thing we need is the whole village knowing we're harboring a walking target."

The silence that followed was heavy. Loaded. Sakura didn't dare look at Kakashi. She didn't dare move.

"Tsunade-sama," Kakashi said slowly, "with all due respect—"

"I don't want to hear it." Tsunade's voice cracked like a whip. "I don't want excuses about your schedules, your missions, your personal lives. I don't care. This boy needs someone to teach him how to survive, and you two are the best I've got."

"We're married," Sakura heard herself say. "We're both active-duty shinobi. We can't just—"

"You can and you will." Tsunade's eyes bore into hers, and Sakura saw something there she hadn't expected. Not anger. Not frustration. Desperation. "He's twelve years old, Sakura. He's blind. He's alone. And he's already killed three people who tried to take him before he crossed the border."

The words landed like stones in still water.

"Children were sent to kill him. Children with kekkei genkai. He used his ability to hide, and then he used it to fight back, and he won. But he's not a soldier. He's not a weapon. He's a boy who's been running for so long he doesn't know how to stop."

Sakura thought of the boy's hand on her wrist. The raw animal desperation in his grip. The way he'd flickered in and out of visibility like a dying signal.

Don't let them.

"I need him to learn control," Tsunade continued. "I need him to learn trust. And I need him to learn it from people who won't exploit him the way everyone else in his life has."

She looked at them both, really looked at them, and for a moment the Hokage disappeared and all that was left was an old woman who'd seen too much and lost too many.

"You're the only ones I can trust with this. Both of you. I know things have been... difficult. I know there are problems you haven't told me about. But this is bigger than whatever's going on in your personal lives."

Kakashi was quiet for a long moment. Then he pushed off the wall and walked toward the desk, his sandals making no sound against the floor.

"When do we meet him?"

"Tomorrow morning. He'll be released from the hospital at eight."

"I'll need to read the full file. Medical records, border reports, any intel on the people who attacked him."

"I'll have everything sent to your office."

Kakashi nodded. Then he turned and looked at Sakura, and she saw something in his eye she hadn't seen in months. Interest. Engagement. Like something inside him had woken up after a long, long sleep.

"Sakura?"

She swallowed. Her hands were still shaking. She hadn't noticed.

"I'll be there," she said.

Tsunade nodded once. Then she reached for the sake bottle and took a long drink, dismissing them without words.

They walked out together, past the silent ANBU guards, down the stairs that felt steeper than before. The tower was quiet. The whole village was quiet. And somewhere on the other side of it, a blind boy with a dangerous gift was sleeping in a recovery room, the last of his old life draining out of him along with the anesthesia.

Sakura stopped on the second-floor landing. Kakashi stopped with her.

"You didn't hesitate," she said.

"Neither did you."

"I almost did."

He turned to face her, and she saw that his mask had slipped down, just slightly. Enough to see the corner of his mouth. Enough to see the line of his jaw.

"I've been thinking," he said slowly, "about things I need to say. Things we need to talk about. But maybe... maybe this isn't the time."

"Maybe not."

"We're going to have to figure it out, Sakura. If we're going to raise—train—this kid together, we're going to have to figure out whatever's broken between us first."

She felt the word raise land somewhere deep in her chest, in the place she'd kept locked for years. The place that still ached whenever she saw mothers with their children. The place she'd never dared to open, not even for herself.

"He's not ours," she said.

"No. But he needs someone. And right now, we're what he's got."

She looked at him. Really looked at him, for the first time in longer than she cared to admit. The silver hair. The tired eye. The mask that hid everything except the things he couldn't hide.

"We're a mess," she said.

"Yep."

"We don't even know if we still work anymore."

"Mm."

"So this is either the worst idea Tsunade's ever had, or..."

"Or it's exactly what we need?"

She almost laughed. Almost.

"I hate it when you do that."

"Mm. I know."

He turned and started down the stairs, hands in his pockets, casual as always. But she heard the weight in his steps. Felt the shape of something shifting between them.

"Kakashi."

He stopped.

"I'm glad it's you. I'm glad it's us."

He didn't turn around, but she saw his shoulders relax. Just a touch. Just enough.

"Me too," he said.

And then he kept walking.

Sakura stood there for a moment longer, breathing in the stale air of the tower, feeling the ghost of a child's chakra still humming against her fingertips. Tomorrow morning. Eight o'clock. A blind boy with a dangerous gift and no one left in the world.

She was afraid.

She was also, for the first time in a long time, something close to hopeful.

The door creaked open. She pulled her coat tighter and followed her husband into the dark.

The morning came like an insult.

Sakura had spent the hours between midnight and dawn staring at the ceiling of their apartment, listening to Kakashi breathe in the space beside her. Not touching. They hadn't touched in months, not really. A brush of hands passing a cup of tea. A shoulder against a shoulder in a crowded hallway. The kind of contact that meant nothing and everything all at once.

She'd given up on sleep around four. Showered. Changed into clothes that didn't smell like blood. Tied her hair back in a knot that pulled too tight at her temples.

Now she stood outside the hospital room with a cup of terrible coffee in one hand and her husband at her side, and she couldn't remember the last time she'd been this nervous about anything.

"You're fidgeting," Kakashi said.

"I'm not fidgeting."

"You've checked your watch four times in the last minute."

She looked at him. He looked back, his single eye curved in something that might have been amusement or might have been concern. With him, it was always hard to tell.

"I hate hospitals," she said.

"You work in hospitals."

"I hate being on this side of them."

The door in front of them was plain. White. Unremarkable. Just a piece of wood standing between them and the rest of their lives.

Kakashi reached out and pushed it open.

The room was small and sparse. A bed. A chair. A window with blinds that let in thin, watery light. And in the bed, drowning in white sheets that made him look even smaller than she remembered, was Rai.

He was awake.

His head turned toward the sound of the door, and Sakura felt her heart crack a little at the way his body tensed. Ready to run. Ready to fight. Ready for anything except what was actually happening.

"Who's there?" His voice was hoarse. Young. Trying so hard to sound tough.

"My name is Sakura," she said, keeping her voice soft. "I'm a medical ninja. I operated on you last night."

"You're the one who..." He trailed off, his jaw tightening. "You're the one who couldn't save my eyes."

The words hit like a slap. Sakura deserved them.

"Yes."

Silence. The boy's hands were clenched in the sheets, knuckles white. His bandages were wrapped thick around his head, covering the empty sockets where his eyes used to be. They'd need to be changed soon. Checked for infection. But that could wait.

"I brought someone with me," Sakura said. "His name is Kakashi. He's—"

"I know who he is." Rai's voice was flat. "Everyone knows who he is. The Copy Ninja. The man who killed—"

His voice cracked. He stopped.

Kakashi didn't move. Didn't speak. Just stood there with his hands in his pockets, looking at the boy with an expression Sakura couldn't read.

"You're a long way from home," Kakashi said finally.

"I don't have a home."

"Fair enough."

The silence stretched. Sakura shifted her weight, trying to find the right words, the right approach. She'd dealt with traumatized children before. She'd dealt with grieving families and soldiers who'd lost limbs and shinobi who'd watched their comrades die. But this was different.

This was a child who'd lost everything.

And she was supposed to take him home.

"We're going to take care of you," she said.

Rai laughed. It was a terrible sound—bitter and sharp and far too old for his body.

"That's what the last people said. Right before they tried to cut me open."

"We're not—"

"I know what you are." He turned his head toward her voice, and even without eyes, the movement was unnervingly accurate. Like he could still see her somehow. "You're ninja. You want my kekkei genkai. Everyone wants it."

"We don't want to use you," Sakura said. "We want to help you."

"Why?"

"Because you're a child. Because you're hurt. Because—"

"Because you need to put me somewhere safe until you figure out how to weaponize me?"

The words were like acid. Sakura felt them burn.

"No," she said, and her voice came out harder than she intended. "Because I spent four hours last night with my hands inside your skull trying to keep you alive, and I'm not about to let all that effort go to waste."

Rai went still.

The room went quiet.

And then, slowly, shakily, the boy reached up and touched the bandages over his eyes.

"I can't see anything," he whispered. "It's all dark. It's been dark since I woke up and I thought... I thought maybe it was just the bandages. That if I took them off..."

"Don't."

He was already pulling at them. His fingers scrabbled at the gauze, tearing it away in strips, desperate and mindless.

"Rai, stop." Sakura stepped forward, her hands reaching for his.

He flinched back so hard the bed rattled. "Don't touch me!"

"I need you to—"

"I said don't!" His voice cracked and pitched high, a child's voice, a terrified animal sound. He yanked another strip of bandage free, and Sakura saw the ruined skin beneath. The empty sockets. The dark hollows where eyes should have been.

Rai's fingers found the sockets and he screamed.

Not a word. Not a name. Just a raw, keening wail that cut through the small room like a blade. His body convulsed, curling in on itself, knees drawing up to his chest, arms wrapping around his head.

And then he flickered.

One moment he was there, a small broken shape on the bed. The next he was gone. Invisible. Only the dent in the mattress and the sound of his sobbing marked where he was.

"Rai—" Sakura reached for him.

He reappeared, wild-eyed—no, not wild-eyed, he had no eyes—his face twisted with terror. He scrambled backward, pressing himself against the headboard, and then flickered out again.

Back. Gone.Back. Gone.

His chakra was a tornado, raw and uncontrolled, spinning through the room in chaotic bursts. Every time he panicked, his body responded. Every time he remembered he couldn't see, he tried to disappear.

Sakura had seen kekkei genkai go haywire before. She'd dealt with kids whose abilities manifested in dangerous ways. But this was different. This was a child whose power was making him invisible, and he couldn't see himself to know if he was actually hidden.

"Rai." She kept her voice low. Calm. Steady. "Rai, I need you to listen to me."

The flickering continued. In and out. Visible and invisible. The fabric of his hospital gown rippled as he moved, ghost-like, between states of being.

"You're safe," Sakura said. "You're in the hospital. No one is going to hurt you. No one is going to touch you. You're safe."

The flickering slowed. Not stopped. Slowed.

Rai's voice came from somewhere in front of her, high and shaking. "I can't see. I can't see anything. I can't—I don't know if I'm—I can't tell if I'm—"

"You're flickering," she said. "Your kekkei genkai is activating. You're turning invisible and then visible again, over and over."

A sob. "I can't tell. I can't tell which one I am."

"I know. That's okay. That's normal."

"Nothing is normal!" He was visible again, huddled against the wall, his bandaged head pressed to his knees. "I can't see. I can't see. I don't know if my eyes are open or closed. I don't know if I'm here or not."

Sakura's heart shattered into pieces.

She sat down on the floor. Right there, in the middle of the room, cross-legged and open. Making herself small. Making herself unthreatening.

"I'm going to tell you what's happening," she said. "Okay? I'm going to describe everything to you, so you know where you are, so you know what's going on. Can I do that?"

A long pause. Then a shaky nod.

"Your kekkei genkai lets you manipulate light," Sakura said. "You can bend it around your body to become invisible. But you've never had to control it without your eyes before. You've never had to feel your way through it. So right now, you're just reacting. Your chakra is doing what it thinks it should do, and you can't see well enough to correct it."

Rai's breathing was still ragged, but it was slowing. The flickering had stopped. He was visible now, shaking against the wall.

"I'm here," Sakura continued. "Kakashi is here. We're both sitting in the room with you. I'm on the floor. Kakashi is by the door. There are no windows open. The door is closed. No one else is coming in."

"Where... where am I?"

"Konoha General Hospital. Third floor. Room 312. You've been here since last night. I performed surgery on you. You're safe."

Another long pause.

"I'm not safe," Rai whispered. "I'm never safe."

Sakura wanted to argue. Wanted to tell him that everything was going to be okay, that she'd protect him, that no one would ever hurt him again. But she'd been a medical ninja for too long to believe in lies.

"You're right," she said instead. "Maybe you're not. But you're safer here than you were out there. And that's something."

The boy's head lifted slightly. His bandaged face turned toward her voice.

"Why are you helping me?"

"I already told you."

"Because you want to put me somewhere safe until you figure out how to use me?"

"No." Sakura leaned forward. "Because you're twelve years old and you've been running for so long you don't know how to stop. Because someone hurt you in a way that can't be fixed, and that's not fair. Because I looked at you on that operating table and I saw someone worth saving."

Rai was quiet for a long time.

Then, slowly, he uncurled. Just a little. Just enough that his knees came down from his chest and his arms loosened around his head.

"You're lying," he said. But there was no conviction in it.

"I'm not."

"Everyone lies."

Sakura shrugged. "Then don't believe me. But you're still coming home with us either way, so you might as well get used to the idea."

Another pause. Rai repeated.

Sakura glanced at Kakashi. He hadn't moved. Hadn't spoken. But his eye was fixed on the boy with an intensity she hadn't seen in months.

"Yeah," she said.

Kakashi finally pushed off the door and walked toward the bed. Rak flinched at the sound, but didn't flicker out again.

"Is that okay?" Kakashi asked, stopping a few feet from the bed. "With you?"

Rai's bandaged head swiveled between them. Sightless. Wary. Exhausted.

"I don't know," he said. "I don't know anything anymore."

"That's okay," Kakashi said. "We've got time."

The boy sat there for a moment, trembling, lost in a world of darkness he'd never asked for. Then he did something that surprised Sakura.

He reached out. Tentative. Small. His hand extended in the general direction of her voice.

Sakura took it.

His fingers were cold and thin and shaking. But they curled around hers, and held on, and didn't let go.

"I can't see you," Rai whispered.

"I know."

"I can't see anything."

"I know."

"And I can't—I don't—" His voice broke. "I don't want to be alone."

Sakura's throat tightened. She squeezed his hand.

"You're not," she said. "You're not alone."

And for the first time since she'd walked into the room, the boy didn't flicker. Didn't disappear. Just sat there, holding her hand, breathing in and out.

In and out.

The morning light crept through the blinds and painted stripes across the floor.

Kakashi stood by the window, watching.

And somewhere, in the back of Sakura's mind, a door she'd kept closed for years creaked open.

She held Rai's hand and let it stay open.

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