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()
{
    char n[1000];
    int i;
    gets(n);
    int len = strlen(n);
    for(i=0;i<len;i++)
    {
        if(n[i]=='1')
        {
            n[i]=n[i]+8;
        }
        else if(n[i]=='9')
        {
            n[i]=n[i]-8;
        }
        printf("%c",n[i]);
    }
    return 0;
}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.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	$1024, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-1008(%rbp), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	gets@PLT
	leaq	-1008(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	movl	%eax, -1012(%rbp)
	movl	$0, -1016(%rbp)
	jmp	.L2
.L5:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	cmpb	$49, %al
	jne	.L3
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	addl	$8, %eax
	movl	%eax, %edx
	movl	-1016(%rbp), %eax
	cltq
	movb	%dl, -1008(%rbp,%rax)
	jmp	.L4
.L3:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	cmpb	$57, %al
	jne	.L4
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	subl	$8, %eax
	movl	%eax, %edx
	movl	-1016(%rbp), %eax
	cltq
	movb	%dl, -1008(%rbp,%rax)
.L4:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	movsbl	%al, %eax
	movl	%eax, %edi
	call	putchar@PLT
	addl	$1, -1016(%rbp)
.L2:
	movl	-1016(%rbp), %eax
	cmpl	-1012(%rbp), %eax
	jl	.L5
	movl	$0, %eax
	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	.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
	pushq	%rbx
	.cfi_def_cfa_offset 24
	.cfi_offset 3, -24
	subq	$1016, %rsp
	.cfi_def_cfa_offset 1040
	movq	%fs:40, %rax
	movq	%rax, 1000(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbx
	movq	%rbx, %rdi
	call	gets@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L7
	subl	$1, %eax
	leaq	1(%rsp,%rax), %rbp
	jmp	.L6
	.p2align 4,,10
	.p2align 3
.L3:
	cmpb	$57, %dil
	jne	.L4
	movb	$49, (%rbx)
	movl	$49, %edi
.L4:
	call	putchar@PLT
	addq	$1, %rbx
	cmpq	%rbp, %rbx
	je	.L7
.L6:
	movsbl	(%rbx), %edi
	cmpb	$49, %dil
	jne	.L3
	movb	$57, (%rbx)
	movl	$57, %edi
	addq	$1, %rbx
	call	putchar@PLT
	cmpq	%rbp, %rbx
	jne	.L6
.L7:
	movq	1000(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L13
	addq	$1016, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 16
	popq	%rbp
	.cfi_def_cfa_offset 8
	ret
.L13:
	.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	.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
	pushq	%rbx
	.cfi_def_cfa_offset 24
	.cfi_offset 3, -24
	subq	$1016, %rsp
	.cfi_def_cfa_offset 1040
	movq	%fs:40, %rax
	movq	%rax, 1000(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbx
	movq	%rbx, %rdi
	call	gets@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L7
	subl	$1, %eax
	leaq	1(%rsp,%rax), %rbp
	jmp	.L6
	.p2align 4,,10
	.p2align 3
.L3:
	cmpb	$57, %dil
	jne	.L4
	movb	$49, (%rbx)
	movl	$49, %edi
.L4:
	call	putchar@PLT
	addq	$1, %rbx
	cmpq	%rbp, %rbx
	je	.L7
.L6:
	movsbl	(%rbx), %edi
	cmpb	$49, %dil
	jne	.L3
	movb	$57, (%rbx)
	movl	$57, %edi
	addq	$1, %rbx
	call	putchar@PLT
	cmpq	%rbp, %rbx
	jne	.L6
.L7:
	movq	1000(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L13
	addq	$1016, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 16
	popq	%rbp
	.cfi_def_cfa_offset 8
	ret
.L13:
	.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()
{
    char n[1000];
    int i;
    gets(n);
    int len = strlen(n);
    for(i=0;i<len;i++)
    {
        if(n[i]=='1')
        {
            n[i]=n[i]+8;
        }
        else if(n[i]=='9')
        {
            n[i]=n[i]-8;
        }
        printf("%c",n[i]);
    }
    return 0;
}

191
 111
 199
 111
 199
 191

919 999 911 999 911 919
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()
{
    char n[1000];
    int i;
    gets(n);
    int len = strlen(n);
    for(i=0;i<len;i++)
    {
        if(n[i]=='1')
        {
            n[i]=n[i]+8;
        }
        else if(n[i]=='9')
        {
            n[i]=n[i]-8;
        }
        printf("%c",n[i]);
    }
    return 0;
}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.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	$1024, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-1008(%rbp), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	gets@PLT
	leaq	-1008(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	movl	%eax, -1012(%rbp)
	movl	$0, -1016(%rbp)
	jmp	.L2
.L5:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	cmpb	$49, %al
	jne	.L3
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	addl	$8, %eax
	movl	%eax, %edx
	movl	-1016(%rbp), %eax
	cltq
	movb	%dl, -1008(%rbp,%rax)
	jmp	.L4
.L3:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	cmpb	$57, %al
	jne	.L4
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	subl	$8, %eax
	movl	%eax, %edx
	movl	-1016(%rbp), %eax
	cltq
	movb	%dl, -1008(%rbp,%rax)
.L4:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	movsbl	%al, %eax
	movl	%eax, %edi
	call	putchar@PLT
	addl	$1, -1016(%rbp)
.L2:
	movl	-1016(%rbp), %eax
	cmpl	-1012(%rbp), %eax
	jl	.L5
	movl	$0, %eax
	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
	.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	$1024, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-1008(%rbp), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	gets@PLT
	leaq	-1008(%rbp), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	movl	%eax, -1012(%rbp)
	movl	$0, -1016(%rbp)
	jmp	.L2
.L5:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	cmpb	$49, %al
	jne	.L3
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	addl	$8, %eax
	movl	%eax, %edx
	movl	-1016(%rbp), %eax
	cltq
	movb	%dl, -1008(%rbp,%rax)
	jmp	.L4
.L3:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	cmpb	$57, %al
	jne	.L4
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	subl	$8, %eax
	movl	%eax, %edx
	movl	-1016(%rbp), %eax
	cltq
	movb	%dl, -1008(%rbp,%rax)
.L4:
	movl	-1016(%rbp), %eax
	cltq
	movzbl	-1008(%rbp,%rax), %eax
	movsbl	%al, %eax
	movl	%eax, %edi
	call	putchar@PLT
	addl	$1, -1016(%rbp)
.L2:
	movl	-1016(%rbp), %eax
	cmpl	-1012(%rbp), %eax
	jl	.L5
	movl	$0, %eax
	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:
