Given the following C code and assembly code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
#include <stdio.h>
//#include <string.h>

int main(void){
  
  int n,k = 0;
  char s[50];
  scanf("%d %d", &n, &k);
  scanf("%s", s);
  
  if(s[k-1]=='A') s[k-1]='a';
  else if(s[k-1]=='B') s[k-1]='b';
  else if(s[k-1]=='C') s[k-1]='c';
  
  printf("%s", s);

  return 0;
}

  ```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d %d"
.LC1:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC0(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC1(%rip), %rbp
	subq	$88, %rsp
	.cfi_def_cfa_offset 112
	movq	%fs:40, %rax
	movq	%rax, 72(%rsp)
	xorl	%eax, %eax
	leaq	12(%rsp), %rdx
	leaq	8(%rsp), %rsi
	movl	$0, 12(%rsp)
	leaq	16(%rsp), %r12
	call	__isoc99_scanf@PLT
	movq	%r12, %rsi
	movq	%rbp, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	subl	$1, %eax
	cltq
	movzbl	16(%rsp,%rax), %edx
	cmpb	$65, %dl
	je	.L8
	cmpb	$66, %dl
	je	.L9
	cmpb	$67, %dl
	jne	.L3
	movb	$99, 16(%rsp,%rax)
	jmp	.L3
.L9:
	movb	$98, 16(%rsp,%rax)
.L3:
	xorl	%eax, %eax
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movl	$1, %edi
	call	__printf_chk@PLT
	movq	72(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L10
	addq	$88, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
.L8:
	.cfi_restore_state
	movb	$97, 16(%rsp,%rax)
	jmp	.L3
.L10:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE23:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
Optimized Assembly Code:

user
```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d %d"
.LC1:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC0(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC1(%rip), %rbp
	subq	$88, %rsp
	.cfi_def_cfa_offset 112
	movq	%fs:40, %rax
	movq	%rax, 72(%rsp)
	xorl	%eax, %eax
	leaq	12(%rsp), %rdx
	leaq	8(%rsp), %rsi
	movl	$0, 12(%rsp)
	leaq	16(%rsp), %r12
	call	__isoc99_scanf@PLT
	movq	%r12, %rsi
	movq	%rbp, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	subl	$1, %eax
	cltq
	movzbl	16(%rsp,%rax), %edx
	cmpb	$65, %dl
	je	.L8
	cmpb	$66, %dl
	je	.L9
	cmpb	$67, %dl
	jne	.L3
	movb	$99, 16(%rsp,%rax)
	jmp	.L3
.L9:
	movb	$98, 16(%rsp,%rax)
.L3:
	xorl	%eax, %eax
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movl	$1, %edi
	call	__printf_chk@PLT
	movq	72(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L10
	addq	$88, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
.L8:
	.cfi_restore_state
	movb	$97, 16(%rsp,%rax)
	jmp	.L3
.L10:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE23:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```
rule
```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d %d"
.LC1:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC0(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC1(%rip), %rbp
	subq	$88, %rsp
	.cfi_def_cfa_offset 112
	movq	%fs:40, %rax
	movq	%rax, 72(%rsp)
	xorl	%eax, %eax
	leaq	12(%rsp), %rdx
	leaq	8(%rsp), %rsi
	movl	$0, 12(%rsp)
	leaq	16(%rsp), %r12
	call	__isoc99_scanf@PLT
	movq	%r12, %rsi
	movq	%rbp, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	subl	$1, %eax
	cltq
	movzbl	16(%rsp,%rax), %edx
	cmpb	$65, %dl
	je	.L8
	cmpb	$66, %dl
	je	.L9
	cmpb	$67, %dl
	jne	.L3
	movb	$99, 16(%rsp,%rax)
	jmp	.L3
.L9:
	movb	$98, 16(%rsp,%rax)
.L3:
	xorl	%eax, %eax
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movl	$1, %edi
	call	__printf_chk@PLT
	movq	72(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L10
	addq	$88, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
.L8:
	.cfi_restore_state
	movb	$97, 16(%rsp,%rax)
	jmp	.L3
.L10:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE23:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```
```c
#include <stdio.h>
//#include <string.h>

int main(void){
  
  int n,k = 0;
  char s[50];
  scanf("%d %d", &n, &k);
  scanf("%s", s);
  
  if(s[k-1]=='A') s[k-1]='a';
  else if(s[k-1]=='B') s[k-1]='b';
  else if(s[k-1]=='C') s[k-1]='c';
  
  printf("%s", s);

  return 0;
}

  ```
Given the following C code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
#include <stdio.h>
//#include <string.h>

int main(void){
  
  int n,k = 0;
  char s[50];
  scanf("%d %d", &n, &k);
  scanf("%s", s);
  
  if(s[k-1]=='A') s[k-1]='a';
  else if(s[k-1]=='B') s[k-1]='b';
  else if(s[k-1]=='C') s[k-1]='c';
  
  printf("%s", s);

  return 0;
}

  ```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
Optimized Assembly Code:

4 1
CABA
 3 2
ABC
 4 1
CABB
 3 2
ACC
 4 1
C@BB
 3 2
BCC
 5 1
D@BB
 5 1
E@BB
 5 1
BB@E
 5 1
BB@D

cABA AbC cABB AcC c@BB BcC D@BB E@BB bB@E bB@D
Given the following C code and assembly code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
#include <stdio.h>
//#include <string.h>

int main(void){
  
  int n,k = 0;
  char s[50];
  scanf("%d %d", &n, &k);
  scanf("%s", s);
  
  if(s[k-1]=='A') s[k-1]='a';
  else if(s[k-1]=='B') s[k-1]='b';
  else if(s[k-1]=='C') s[k-1]='c';
  
  printf("%s", s);

  return 0;
}

  ```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d %d"
.LC1:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC0(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC1(%rip), %rbp
	subq	$88, %rsp
	.cfi_def_cfa_offset 112
	movq	%fs:40, %rax
	movq	%rax, 72(%rsp)
	xorl	%eax, %eax
	leaq	12(%rsp), %rdx
	leaq	8(%rsp), %rsi
	movl	$0, 12(%rsp)
	leaq	16(%rsp), %r12
	call	__isoc99_scanf@PLT
	movq	%r12, %rsi
	movq	%rbp, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	subl	$1, %eax
	cltq
	movzbl	16(%rsp,%rax), %edx
	cmpb	$65, %dl
	je	.L8
	cmpb	$66, %dl
	je	.L9
	cmpb	$67, %dl
	jne	.L3
	movb	$99, 16(%rsp,%rax)
	jmp	.L3
.L9:
	movb	$98, 16(%rsp,%rax)
.L3:
	xorl	%eax, %eax
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movl	$1, %edi
	call	__printf_chk@PLT
	movq	72(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L10
	addq	$88, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
.L8:
	.cfi_restore_state
	movb	$97, 16(%rsp,%rax)
	jmp	.L3
.L10:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE23:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
Optimized Assembly Code:

train
```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d %d"
.LC1:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC0(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC1(%rip), %rbp
	subq	$88, %rsp
	.cfi_def_cfa_offset 112
	movq	%fs:40, %rax
	movq	%rax, 72(%rsp)
	xorl	%eax, %eax
	leaq	12(%rsp), %rdx
	leaq	8(%rsp), %rsi
	movl	$0, 12(%rsp)
	leaq	16(%rsp), %r12
	call	__isoc99_scanf@PLT
	movq	%r12, %rsi
	movq	%rbp, %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	subl	$1, %eax
	cltq
	movzbl	16(%rsp,%rax), %edx
	cmpb	$65, %dl
	je	.L8
	cmpb	$66, %dl
	je	.L9
	cmpb	$67, %dl
	jne	.L3
	movb	$99, 16(%rsp,%rax)
	jmp	.L3
.L9:
	movb	$98, 16(%rsp,%rax)
.L3:
	xorl	%eax, %eax
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movl	$1, %edi
	call	__printf_chk@PLT
	movq	72(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L10
	addq	$88, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
.L8:
	.cfi_restore_state
	movb	$97, 16(%rsp,%rax)
	jmp	.L3
.L10:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE23:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```