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

```c
/* (1) o     => o
 * (2) oxo   => o ; The number of inner x is odd.
 * (3) oxoxo => o ; The number of inner x is even.
 * (4) ox    => o ; The number of x is odd.
 * (5) oxox  => o ; The number of x is even
 * (6) x     => x
 * (7) xox   => x ; The number of inner o is odd.
 * (8) xoxox => x ; The number of inner o is even.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int
main (
  int   argc,
  char *argv[ ]
  )
{
  char c[ 51 ];

  scanf ( "%s", c );
  puts ( c[ 0 ] == 'o'
      || c[ strlen ( c ) - 1 ] == 'o'
       ? "o" : "x" );

  return ( EXIT_SUCCESS );
}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"o"
.LC1:
	.string	"x"
.LC2:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC2(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC0(%rip), %rbp
	subq	$72, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 56(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %r12
	movq	%r12, %rsi
	call	__isoc99_scanf@PLT
	cmpb	$111, (%rsp)
	je	.L2
	movq	%r12, %rdi
	call	strlen@PLT
	cmpb	$111, -1(%rsp,%rax)
	leaq	.LC1(%rip), %rax
	cmovne	%rax, %rbp
.L2:
	movq	%rbp, %rdi
	call	puts@PLT
	movq	56(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	addq	$72, %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
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE51:
	.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	"o"
.LC1:
	.string	"x"
.LC2:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC2(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC0(%rip), %rbp
	subq	$72, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 56(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %r12
	movq	%r12, %rsi
	call	__isoc99_scanf@PLT
	cmpb	$111, (%rsp)
	je	.L2
	movq	%r12, %rdi
	call	strlen@PLT
	cmpb	$111, -1(%rsp,%rax)
	leaq	.LC1(%rip), %rax
	cmovne	%rax, %rbp
.L2:
	movq	%rbp, %rdi
	call	puts@PLT
	movq	56(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	addq	$72, %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
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE51:
	.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	"o"
.LC1:
	.string	"x"
.LC2:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC2(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC0(%rip), %rbp
	subq	$72, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 56(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %r12
	movq	%r12, %rsi
	call	__isoc99_scanf@PLT
	cmpb	$111, (%rsp)
	je	.L2
	movq	%r12, %rdi
	call	strlen@PLT
	cmpb	$111, -1(%rsp,%rax)
	leaq	.LC1(%rip), %rax
	cmovne	%rax, %rbp
.L2:
	movq	%rbp, %rdi
	call	puts@PLT
	movq	56(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	addq	$72, %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
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE51:
	.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
/* (1) o     => o
 * (2) oxo   => o ; The number of inner x is odd.
 * (3) oxoxo => o ; The number of inner x is even.
 * (4) ox    => o ; The number of x is odd.
 * (5) oxox  => o ; The number of x is even
 * (6) x     => x
 * (7) xox   => x ; The number of inner o is odd.
 * (8) xoxox => x ; The number of inner o is even.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int
main (
  int   argc,
  char *argv[ ]
  )
{
  char c[ 51 ];

  scanf ( "%s", c );
  puts ( c[ 0 ] == 'o'
      || c[ strlen ( c ) - 1 ] == 'o'
       ? "o" : "x" );

  return ( EXIT_SUCCESS );
}```
Given the following C code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
/* (1) o     => o
 * (2) oxo   => o ; The number of inner x is odd.
 * (3) oxoxo => o ; The number of inner x is even.
 * (4) ox    => o ; The number of x is odd.
 * (5) oxox  => o ; The number of x is even
 * (6) x     => x
 * (7) xox   => x ; The number of inner o is odd.
 * (8) xoxox => x ; The number of inner o is even.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int
main (
  int   argc,
  char *argv[ ]
  )
{
  char c[ 51 ];

  scanf ( "%s", c );
  puts ( c[ 0 ] == 'o'
      || c[ strlen ( c ) - 1 ] == 'o'
       ? "o" : "x" );

  return ( EXIT_SUCCESS );
}```

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:

oxxoxoo

o

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

```c
/* (1) o     => o
 * (2) oxo   => o ; The number of inner x is odd.
 * (3) oxoxo => o ; The number of inner x is even.
 * (4) ox    => o ; The number of x is odd.
 * (5) oxox  => o ; The number of x is even
 * (6) x     => x
 * (7) xox   => x ; The number of inner o is odd.
 * (8) xoxox => x ; The number of inner o is even.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int
main (
  int   argc,
  char *argv[ ]
  )
{
  char c[ 51 ];

  scanf ( "%s", c );
  puts ( c[ 0 ] == 'o'
      || c[ strlen ( c ) - 1 ] == 'o'
       ? "o" : "x" );

  return ( EXIT_SUCCESS );
}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"o"
.LC1:
	.string	"x"
.LC2:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC2(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC0(%rip), %rbp
	subq	$72, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 56(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %r12
	movq	%r12, %rsi
	call	__isoc99_scanf@PLT
	cmpb	$111, (%rsp)
	je	.L2
	movq	%r12, %rdi
	call	strlen@PLT
	cmpb	$111, -1(%rsp,%rax)
	leaq	.LC1(%rip), %rax
	cmovne	%rax, %rbp
.L2:
	movq	%rbp, %rdi
	call	puts@PLT
	movq	56(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	addq	$72, %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
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE51:
	.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	"o"
.LC1:
	.string	"x"
.LC2:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	.LC2(%rip), %rdi
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC0(%rip), %rbp
	subq	$72, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 56(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %r12
	movq	%r12, %rsi
	call	__isoc99_scanf@PLT
	cmpb	$111, (%rsp)
	je	.L2
	movq	%r12, %rdi
	call	strlen@PLT
	cmpb	$111, -1(%rsp,%rax)
	leaq	.LC1(%rip), %rax
	cmovne	%rax, %rbp
.L2:
	movq	%rbp, %rdi
	call	puts@PLT
	movq	56(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L8
	addq	$72, %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
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE51:
	.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:
```