Given the following C code and unoptimized 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 i,j,k=0;
    char s[202];

    gets(s);

        for(j=strlen(s)-2;j>=0;j=j-2){
            if(strlen(s)%2!=0)continue;
            if(strncmp(s,s+j/2,j/2)==0){printf("%d",j);;return 0;}
        }

}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata
.LC0:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$240, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	movl	$0, -228(%rbp)
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	gets@PLT
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	subl	$2, %eax
	movl	%eax, -232(%rbp)
	jmp	.L2
.L6:
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	andl	$1, %eax
	testq	%rax, %rax
	jne	.L8
	movl	-232(%rbp), %eax
	movl	%eax, %edx
	shrl	$31, %edx
	addl	%edx, %eax
	sarl	%eax
	movslq	%eax, %rdx
	movl	-232(%rbp), %eax
	movl	%eax, %ecx
	shrl	$31, %ecx
	addl	%ecx, %eax
	sarl	%eax
	cltq
	leaq	-224(%rbp), %rcx
	addq	%rax, %rcx
	leaq	-224(%rbp), %rax
	movq	%rcx, %rsi
	movq	%rax, %rdi
	call	strncmp@PLT
	testl	%eax, %eax
	jne	.L4
	movl	-232(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	jmp	.L5
.L8:
	nop
.L4:
	subl	$2, -232(%rbp)
.L2:
	cmpl	$0, -232(%rbp)
	jns	.L6
	movl	$0, %eax
.L5:
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L7
	call	__stack_chk_fail@PLT
.L7:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.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.
user
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	pushq	%rbx
	.cfi_def_cfa_offset 24
	.cfi_offset 3, -24
	subq	$232, %rsp
	.cfi_def_cfa_offset 256
	movq	%fs:40, %rax
	movq	%rax, 216(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbx
	movq	%rbx, %rdi
	call	gets@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	movl	%eax, %r12d
	subl	$2, %r12d
	js	.L2
	testb	$1, %al
	je	.L4
	jmp	.L2
	.p2align 4,,10
	.p2align 3
.L9:
	subl	$2, %r12d
	js	.L2
.L4:
	movl	%r12d, %edx
	movq	%rbx, %rdi
	sarl	%edx
	movslq	%edx, %rdx
	leaq	(%rbx,%rdx), %rsi
	call	strncmp@PLT
	testl	%eax, %eax
	jne	.L9
	movl	%r12d, %edx
	leaq	.LC0(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L2:
	movq	216(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L10
	addq	$232, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
.L10:
	.cfi_restore_state
	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
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	pushq	%rbx
	.cfi_def_cfa_offset 24
	.cfi_offset 3, -24
	subq	$232, %rsp
	.cfi_def_cfa_offset 256
	movq	%fs:40, %rax
	movq	%rax, 216(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbx
	movq	%rbx, %rdi
	call	gets@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	movl	%eax, %r12d
	subl	$2, %r12d
	js	.L2
	testb	$1, %al
	je	.L4
	jmp	.L2
	.p2align 4,,10
	.p2align 3
.L9:
	subl	$2, %r12d
	js	.L2
.L4:
	movl	%r12d, %edx
	movq	%rbx, %rdi
	sarl	%edx
	movslq	%edx, %rdx
	leaq	(%rbx,%rdx), %rsi
	call	strncmp@PLT
	testl	%eax, %eax
	jne	.L9
	movl	%r12d, %edx
	leaq	.LC0(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L2:
	movq	216(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L10
	addq	$232, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
.L10:
	.cfi_restore_state
	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:

#include<stdio.h>
#include<string.h>

int main(void){
    int i,j,k=0;
    char s[202];

    gets(s);

        for(j=strlen(s)-2;j>=0;j=j-2){
            if(strlen(s)%2!=0)continue;
            if(strncmp(s,s+j/2,j/2)==0){printf("%d",j);;return 0;}
        }

}

cbacbacbacba
 xxxy
 akakasaakasakasakaakas
 bbbabbbacabc
 akasakaakasakasaka`kas
 cbacbacbacbb
 abaabacaab
 bbcabcaacabc
 xxwx
 abcabcabcaac

6 2 4 8 14 6 6 2 2 6
Given the following C code and unoptimized 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 i,j,k=0;
    char s[202];

    gets(s);

        for(j=strlen(s)-2;j>=0;j=j-2){
            if(strlen(s)%2!=0)continue;
            if(strncmp(s,s+j/2,j/2)==0){printf("%d",j);;return 0;}
        }

}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata
.LC0:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$240, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	movl	$0, -228(%rbp)
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	gets@PLT
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	subl	$2, %eax
	movl	%eax, -232(%rbp)
	jmp	.L2
.L6:
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	andl	$1, %eax
	testq	%rax, %rax
	jne	.L8
	movl	-232(%rbp), %eax
	movl	%eax, %edx
	shrl	$31, %edx
	addl	%edx, %eax
	sarl	%eax
	movslq	%eax, %rdx
	movl	-232(%rbp), %eax
	movl	%eax, %ecx
	shrl	$31, %ecx
	addl	%ecx, %eax
	sarl	%eax
	cltq
	leaq	-224(%rbp), %rcx
	addq	%rax, %rcx
	leaq	-224(%rbp), %rax
	movq	%rcx, %rsi
	movq	%rax, %rdi
	call	strncmp@PLT
	testl	%eax, %eax
	jne	.L4
	movl	-232(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	jmp	.L5
.L8:
	nop
.L4:
	subl	$2, -232(%rbp)
.L2:
	cmpl	$0, -232(%rbp)
	jns	.L6
	movl	$0, %eax
.L5:
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L7
	call	__stack_chk_fail@PLT
.L7:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.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.
train
	.file	"temp.c"
	.text
	.section	.rodata
.LC0:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$240, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	movl	$0, -228(%rbp)
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	gets@PLT
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	subl	$2, %eax
	movl	%eax, -232(%rbp)
	jmp	.L2
.L6:
	leaq	-224(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	andl	$1, %eax
	testq	%rax, %rax
	jne	.L8
	movl	-232(%rbp), %eax
	movl	%eax, %edx
	shrl	$31, %edx
	addl	%edx, %eax
	sarl	%eax
	movslq	%eax, %rdx
	movl	-232(%rbp), %eax
	movl	%eax, %ecx
	shrl	$31, %ecx
	addl	%ecx, %eax
	sarl	%eax
	cltq
	leaq	-224(%rbp), %rcx
	addq	%rax, %rcx
	leaq	-224(%rbp), %rax
	movq	%rcx, %rsi
	movq	%rax, %rdi
	call	strncmp@PLT
	testl	%eax, %eax
	jne	.L4
	movl	-232(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	jmp	.L5
.L8:
	nop
.L4:
	subl	$2, -232(%rbp)
.L2:
	cmpl	$0, -232(%rbp)
	jns	.L6
	movl	$0, %eax
.L5:
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L7
	call	__stack_chk_fail@PLT
.L7:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.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:
