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() {
	char a[100010];
	int ans = 0, len;
	int l = 0, r = 1;
	scanf("%s", a);
	len = strlen(a);
	for (; l <= len - r; l++,r++)
	{

		if (a[l] != a[len - r]) {
			if (a[l] == 'x') {
				r--;
				ans++;
			}
			else if (a[len - r] == 'x') {
				l--;
				ans++;
			}
			else {
				printf("-1");
				return 0;
			}
		}
	}
	printf("%d", ans);
	return 0;
}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%s"
.LC1:
	.string	"-1"
.LC2:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	leaq	-98304(%rsp), %r11
	.cfi_def_cfa 11, 98320
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$1728, %rsp
	.cfi_def_cfa_offset 100048
	leaq	.LC0(%rip), %rdi
	movq	%fs:40, %rax
	movq	%rax, 100024(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	movq	%rbp, %rsi
	call	__isoc99_scanf@PLT
	movq	%rbp, %rdi
	call	strlen@PLT
	testl	%eax, %eax
	je	.L10
	movl	%eax, %edi
	leal	-1(%rax), %edx
	movl	$1, %esi
	xorl	%eax, %eax
	xorl	%r8d, %r8d
	jmp	.L8
	.p2align 4,,10
	.p2align 3
.L15:
	cmpb	$120, %cl
	je	.L14
	cmpb	$120, %dl
	jne	.L6
	addl	$1, %r8d
	addl	$1, %esi
.L5:
	movl	%edi, %edx
	subl	%esi, %edx
	cmpl	%eax, %edx
	jl	.L2
.L8:
	movslq	%eax, %rcx
	movslq	%edx, %rdx
	movzbl	(%rsp,%rcx), %ecx
	movzbl	(%rsp,%rdx), %edx
	cmpb	%dl, %cl
	jne	.L15
	addl	$1, %esi
	movl	%edi, %edx
	addl	$1, %eax
	subl	%esi, %edx
	cmpl	%eax, %edx
	jge	.L8
.L2:
	movl	%r8d, %edx
	leaq	.LC2(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L7:
	movq	100024(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L16
	addq	$100032, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 16
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 8
	ret
	.p2align 4,,10
	.p2align 3
.L14:
	.cfi_restore_state
	addl	$1, %r8d
	addl	$1, %eax
	jmp	.L5
.L6:
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L7
.L10:
	xorl	%r8d, %r8d
	jmp	.L2
.L16:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE35:
	.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	"%s"
.LC1:
	.string	"-1"
.LC2:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	leaq	-98304(%rsp), %r11
	.cfi_def_cfa 11, 98320
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$1728, %rsp
	.cfi_def_cfa_offset 100048
	leaq	.LC0(%rip), %rdi
	movq	%fs:40, %rax
	movq	%rax, 100024(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	movq	%rbp, %rsi
	call	__isoc99_scanf@PLT
	movq	%rbp, %rdi
	call	strlen@PLT
	testl	%eax, %eax
	je	.L10
	movl	%eax, %edi
	leal	-1(%rax), %edx
	movl	$1, %esi
	xorl	%eax, %eax
	xorl	%r8d, %r8d
	jmp	.L8
	.p2align 4,,10
	.p2align 3
.L15:
	cmpb	$120, %cl
	je	.L14
	cmpb	$120, %dl
	jne	.L6
	addl	$1, %r8d
	addl	$1, %esi
.L5:
	movl	%edi, %edx
	subl	%esi, %edx
	cmpl	%eax, %edx
	jl	.L2
.L8:
	movslq	%eax, %rcx
	movslq	%edx, %rdx
	movzbl	(%rsp,%rcx), %ecx
	movzbl	(%rsp,%rdx), %edx
	cmpb	%dl, %cl
	jne	.L15
	addl	$1, %esi
	movl	%edi, %edx
	addl	$1, %eax
	subl	%esi, %edx
	cmpl	%eax, %edx
	jge	.L8
.L2:
	movl	%r8d, %edx
	leaq	.LC2(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L7:
	movq	100024(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L16
	addq	$100032, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 16
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 8
	ret
	.p2align 4,,10
	.p2align 3
.L14:
	.cfi_restore_state
	addl	$1, %r8d
	addl	$1, %eax
	jmp	.L5
.L6:
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L7
.L10:
	xorl	%r8d, %r8d
	jmp	.L2
.L16:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE35:
	.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	"%s"
.LC1:
	.string	"-1"
.LC2:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	leaq	-98304(%rsp), %r11
	.cfi_def_cfa 11, 98320
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$1728, %rsp
	.cfi_def_cfa_offset 100048
	leaq	.LC0(%rip), %rdi
	movq	%fs:40, %rax
	movq	%rax, 100024(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	movq	%rbp, %rsi
	call	__isoc99_scanf@PLT
	movq	%rbp, %rdi
	call	strlen@PLT
	testl	%eax, %eax
	je	.L10
	movl	%eax, %edi
	leal	-1(%rax), %edx
	movl	$1, %esi
	xorl	%eax, %eax
	xorl	%r8d, %r8d
	jmp	.L8
	.p2align 4,,10
	.p2align 3
.L15:
	cmpb	$120, %cl
	je	.L14
	cmpb	$120, %dl
	jne	.L6
	addl	$1, %r8d
	addl	$1, %esi
.L5:
	movl	%edi, %edx
	subl	%esi, %edx
	cmpl	%eax, %edx
	jl	.L2
.L8:
	movslq	%eax, %rcx
	movslq	%edx, %rdx
	movzbl	(%rsp,%rcx), %ecx
	movzbl	(%rsp,%rdx), %edx
	cmpb	%dl, %cl
	jne	.L15
	addl	$1, %esi
	movl	%edi, %edx
	addl	$1, %eax
	subl	%esi, %edx
	cmpl	%eax, %edx
	jge	.L8
.L2:
	movl	%r8d, %edx
	leaq	.LC2(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L7:
	movq	100024(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L16
	addq	$100032, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 16
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 8
	ret
	.p2align 4,,10
	.p2align 3
.L14:
	.cfi_restore_state
	addl	$1, %r8d
	addl	$1, %eax
	jmp	.L5
.L6:
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L7
.L10:
	xorl	%r8d, %r8d
	jmp	.L2
.L16:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE35:
	.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() {
	char a[100010];
	int ans = 0, len;
	int l = 0, r = 1;
	scanf("%s", a);
	len = strlen(a);
	for (; l <= len - r; l++,r++)
	{

		if (a[l] != a[len - r]) {
			if (a[l] == 'x') {
				r--;
				ans++;
			}
			else if (a[len - r] == 'x') {
				l--;
				ans++;
			}
			else {
				printf("-1");
				return 0;
			}
		}
	}
	printf("%d", ans);
	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() {
	char a[100010];
	int ans = 0, len;
	int l = 0, r = 1;
	scanf("%s", a);
	len = strlen(a);
	for (; l <= len - r; l++,r++)
	{

		if (a[l] != a[len - r]) {
			if (a[l] == 'x') {
				r--;
				ans++;
			}
			else if (a[len - r] == 'x') {
				l--;
				ans++;
			}
			else {
				printf("-1");
				return 0;
			}
		}
	}
	printf("%d", ans);
	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:

b
 axbax
 `b
 xxxo
 tpxt
 c
 bxbax
 b`
 yxxo
 d

0 2 -1 3 1 0 -1 -1 -1 0
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() {
	char a[100010];
	int ans = 0, len;
	int l = 0, r = 1;
	scanf("%s", a);
	len = strlen(a);
	for (; l <= len - r; l++,r++)
	{

		if (a[l] != a[len - r]) {
			if (a[l] == 'x') {
				r--;
				ans++;
			}
			else if (a[len - r] == 'x') {
				l--;
				ans++;
			}
			else {
				printf("-1");
				return 0;
			}
		}
	}
	printf("%d", ans);
	return 0;
}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%s"
.LC1:
	.string	"-1"
.LC2:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	leaq	-98304(%rsp), %r11
	.cfi_def_cfa 11, 98320
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$1728, %rsp
	.cfi_def_cfa_offset 100048
	leaq	.LC0(%rip), %rdi
	movq	%fs:40, %rax
	movq	%rax, 100024(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	movq	%rbp, %rsi
	call	__isoc99_scanf@PLT
	movq	%rbp, %rdi
	call	strlen@PLT
	testl	%eax, %eax
	je	.L10
	movl	%eax, %edi
	leal	-1(%rax), %edx
	movl	$1, %esi
	xorl	%eax, %eax
	xorl	%r8d, %r8d
	jmp	.L8
	.p2align 4,,10
	.p2align 3
.L15:
	cmpb	$120, %cl
	je	.L14
	cmpb	$120, %dl
	jne	.L6
	addl	$1, %r8d
	addl	$1, %esi
.L5:
	movl	%edi, %edx
	subl	%esi, %edx
	cmpl	%eax, %edx
	jl	.L2
.L8:
	movslq	%eax, %rcx
	movslq	%edx, %rdx
	movzbl	(%rsp,%rcx), %ecx
	movzbl	(%rsp,%rdx), %edx
	cmpb	%dl, %cl
	jne	.L15
	addl	$1, %esi
	movl	%edi, %edx
	addl	$1, %eax
	subl	%esi, %edx
	cmpl	%eax, %edx
	jge	.L8
.L2:
	movl	%r8d, %edx
	leaq	.LC2(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L7:
	movq	100024(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L16
	addq	$100032, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 16
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 8
	ret
	.p2align 4,,10
	.p2align 3
.L14:
	.cfi_restore_state
	addl	$1, %r8d
	addl	$1, %eax
	jmp	.L5
.L6:
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L7
.L10:
	xorl	%r8d, %r8d
	jmp	.L2
.L16:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE35:
	.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	"%s"
.LC1:
	.string	"-1"
.LC2:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	leaq	-98304(%rsp), %r11
	.cfi_def_cfa 11, 98320
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$1728, %rsp
	.cfi_def_cfa_offset 100048
	leaq	.LC0(%rip), %rdi
	movq	%fs:40, %rax
	movq	%rax, 100024(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	movq	%rbp, %rsi
	call	__isoc99_scanf@PLT
	movq	%rbp, %rdi
	call	strlen@PLT
	testl	%eax, %eax
	je	.L10
	movl	%eax, %edi
	leal	-1(%rax), %edx
	movl	$1, %esi
	xorl	%eax, %eax
	xorl	%r8d, %r8d
	jmp	.L8
	.p2align 4,,10
	.p2align 3
.L15:
	cmpb	$120, %cl
	je	.L14
	cmpb	$120, %dl
	jne	.L6
	addl	$1, %r8d
	addl	$1, %esi
.L5:
	movl	%edi, %edx
	subl	%esi, %edx
	cmpl	%eax, %edx
	jl	.L2
.L8:
	movslq	%eax, %rcx
	movslq	%edx, %rdx
	movzbl	(%rsp,%rcx), %ecx
	movzbl	(%rsp,%rdx), %edx
	cmpb	%dl, %cl
	jne	.L15
	addl	$1, %esi
	movl	%edi, %edx
	addl	$1, %eax
	subl	%esi, %edx
	cmpl	%eax, %edx
	jge	.L8
.L2:
	movl	%r8d, %edx
	leaq	.LC2(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L7:
	movq	100024(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L16
	addq	$100032, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 16
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 8
	ret
	.p2align 4,,10
	.p2align 3
.L14:
	.cfi_restore_state
	addl	$1, %r8d
	addl	$1, %eax
	jmp	.L5
.L6:
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L7
.L10:
	xorl	%r8d, %r8d
	jmp	.L2
.L16:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE35:
	.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:
```