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>

int main()
{
    unsigned long long len,i,count[26],k,l,a[26];
    for(i=0;i<26;i++)count[i]=0;
    char s[1000000];
    scanf("%s",s);
    len=strlen(s);
    for(i=0;i<len;i++){
        count[s[i]-97]++;
    }
    for(i=0;i<26;i++){
        k=1;if(count[i]==0){k=5;break;}
    }
    if(k==1){printf("None\n");return 0;}
    for(i=0;i<26;i++){
        if(count[i]==0){printf("%c\n",i+97);return 0;}
    }

}
```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%s"
.LC1:
	.string	"%c\n"
.LC2:
	.string	"None"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.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
	leaq	-999424(%rsp), %r11
	.cfi_def_cfa 11, 999448
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$808, %rsp
	.cfi_def_cfa_offset 1000256
	movl	$26, %ecx
	movq	%fs:40, %rax
	movq	%rax, 1000216(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	leaq	208(%rsp), %rbx
	movq	%rbp, %rdi
	movq	%rbx, %rsi
	rep stosq
	leaq	.LC0(%rip), %rdi
	call	__isoc99_scanf@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L2
	movq	%rbx, %rdx
	leaq	(%rbx,%rax), %rcx
	.p2align 4,,10
	.p2align 3
.L3:
	movsbl	(%rdx), %eax
	addq	$1, %rdx
	subl	$97, %eax
	cltq
	addq	$1, (%rsp,%rax,8)
	cmpq	%rdx, %rcx
	jne	.L3
.L2:
	movq	%rbp, %rax
	jmp	.L5
	.p2align 4,,10
	.p2align 3
.L23:
	addq	$8, %rax
	cmpq	%rax, %rbx
	je	.L22
.L5:
	movq	(%rax), %rdx
	testq	%rdx, %rdx
	jne	.L23
	jmp	.L4
	.p2align 4,,10
	.p2align 3
.L7:
	addq	$1, %rdx
	cmpq	$26, %rdx
	je	.L8
.L4:
	cmpq	$0, 0(%rbp,%rdx,8)
	jne	.L7
	addq	$97, %rdx
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L8:
	movq	1000216(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L24
	addq	$1000232, %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
.L22:
	.cfi_restore_state
	leaq	.LC2(%rip), %rdi
	call	puts@PLT
	jmp	.L8
.L24:
	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	"%s"
.LC1:
	.string	"%c\n"
.LC2:
	.string	"None"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.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
	leaq	-999424(%rsp), %r11
	.cfi_def_cfa 11, 999448
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$808, %rsp
	.cfi_def_cfa_offset 1000256
	movl	$26, %ecx
	movq	%fs:40, %rax
	movq	%rax, 1000216(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	leaq	208(%rsp), %rbx
	movq	%rbp, %rdi
	movq	%rbx, %rsi
	rep stosq
	leaq	.LC0(%rip), %rdi
	call	__isoc99_scanf@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L2
	movq	%rbx, %rdx
	leaq	(%rbx,%rax), %rcx
	.p2align 4,,10
	.p2align 3
.L3:
	movsbl	(%rdx), %eax
	addq	$1, %rdx
	subl	$97, %eax
	cltq
	addq	$1, (%rsp,%rax,8)
	cmpq	%rdx, %rcx
	jne	.L3
.L2:
	movq	%rbp, %rax
	jmp	.L5
	.p2align 4,,10
	.p2align 3
.L23:
	addq	$8, %rax
	cmpq	%rax, %rbx
	je	.L22
.L5:
	movq	(%rax), %rdx
	testq	%rdx, %rdx
	jne	.L23
	jmp	.L4
	.p2align 4,,10
	.p2align 3
.L7:
	addq	$1, %rdx
	cmpq	$26, %rdx
	je	.L8
.L4:
	cmpq	$0, 0(%rbp,%rdx,8)
	jne	.L7
	addq	$97, %rdx
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L8:
	movq	1000216(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L24
	addq	$1000232, %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
.L22:
	.cfi_restore_state
	leaq	.LC2(%rip), %rdi
	call	puts@PLT
	jmp	.L8
.L24:
	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	"%s"
.LC1:
	.string	"%c\n"
.LC2:
	.string	"None"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.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
	leaq	-999424(%rsp), %r11
	.cfi_def_cfa 11, 999448
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$808, %rsp
	.cfi_def_cfa_offset 1000256
	movl	$26, %ecx
	movq	%fs:40, %rax
	movq	%rax, 1000216(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	leaq	208(%rsp), %rbx
	movq	%rbp, %rdi
	movq	%rbx, %rsi
	rep stosq
	leaq	.LC0(%rip), %rdi
	call	__isoc99_scanf@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L2
	movq	%rbx, %rdx
	leaq	(%rbx,%rax), %rcx
	.p2align 4,,10
	.p2align 3
.L3:
	movsbl	(%rdx), %eax
	addq	$1, %rdx
	subl	$97, %eax
	cltq
	addq	$1, (%rsp,%rax,8)
	cmpq	%rdx, %rcx
	jne	.L3
.L2:
	movq	%rbp, %rax
	jmp	.L5
	.p2align 4,,10
	.p2align 3
.L23:
	addq	$8, %rax
	cmpq	%rax, %rbx
	je	.L22
.L5:
	movq	(%rax), %rdx
	testq	%rdx, %rdx
	jne	.L23
	jmp	.L4
	.p2align 4,,10
	.p2align 3
.L7:
	addq	$1, %rdx
	cmpq	$26, %rdx
	je	.L8
.L4:
	cmpq	$0, 0(%rbp,%rdx,8)
	jne	.L7
	addq	$97, %rdx
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L8:
	movq	1000216(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L24
	addq	$1000232, %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
.L22:
	.cfi_restore_state
	leaq	.LC2(%rip), %rdi
	call	puts@PLT
	jmp	.L8
.L24:
	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>

int main()
{
    unsigned long long len,i,count[26],k,l,a[26];
    for(i=0;i<26;i++)count[i]=0;
    char s[1000000];
    scanf("%s",s);
    len=strlen(s);
    for(i=0;i<len;i++){
        count[s[i]-97]++;
    }
    for(i=0;i<26;i++){
        k=1;if(count[i]==0){k=5;break;}
    }
    if(k==1){printf("None\n");return 0;}
    for(i=0;i<26;i++){
        if(count[i]==0){printf("%c\n",i+97);return 0;}
    }

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

```c
#include<stdio.h>

int main()
{
    unsigned long long len,i,count[26],k,l,a[26];
    for(i=0;i<26;i++)count[i]=0;
    char s[1000000];
    scanf("%s",s);
    len=strlen(s);
    for(i=0;i<len;i++){
        count[s[i]-97]++;
    }
    for(i=0;i<26;i++){
        k=1;if(count[i]==0){k=5;break;}
    }
    if(k==1){printf("None\n");return 0;}
    for(i=0;i<26;i++){
        if(count[i]==0){printf("%c\n",i+97);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:

atcoderregularcontest

b

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>

int main()
{
    unsigned long long len,i,count[26],k,l,a[26];
    for(i=0;i<26;i++)count[i]=0;
    char s[1000000];
    scanf("%s",s);
    len=strlen(s);
    for(i=0;i<len;i++){
        count[s[i]-97]++;
    }
    for(i=0;i<26;i++){
        k=1;if(count[i]==0){k=5;break;}
    }
    if(k==1){printf("None\n");return 0;}
    for(i=0;i<26;i++){
        if(count[i]==0){printf("%c\n",i+97);return 0;}
    }

}
```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%s"
.LC1:
	.string	"%c\n"
.LC2:
	.string	"None"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.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
	leaq	-999424(%rsp), %r11
	.cfi_def_cfa 11, 999448
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$808, %rsp
	.cfi_def_cfa_offset 1000256
	movl	$26, %ecx
	movq	%fs:40, %rax
	movq	%rax, 1000216(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	leaq	208(%rsp), %rbx
	movq	%rbp, %rdi
	movq	%rbx, %rsi
	rep stosq
	leaq	.LC0(%rip), %rdi
	call	__isoc99_scanf@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L2
	movq	%rbx, %rdx
	leaq	(%rbx,%rax), %rcx
	.p2align 4,,10
	.p2align 3
.L3:
	movsbl	(%rdx), %eax
	addq	$1, %rdx
	subl	$97, %eax
	cltq
	addq	$1, (%rsp,%rax,8)
	cmpq	%rdx, %rcx
	jne	.L3
.L2:
	movq	%rbp, %rax
	jmp	.L5
	.p2align 4,,10
	.p2align 3
.L23:
	addq	$8, %rax
	cmpq	%rax, %rbx
	je	.L22
.L5:
	movq	(%rax), %rdx
	testq	%rdx, %rdx
	jne	.L23
	jmp	.L4
	.p2align 4,,10
	.p2align 3
.L7:
	addq	$1, %rdx
	cmpq	$26, %rdx
	je	.L8
.L4:
	cmpq	$0, 0(%rbp,%rdx,8)
	jne	.L7
	addq	$97, %rdx
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L8:
	movq	1000216(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L24
	addq	$1000232, %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
.L22:
	.cfi_restore_state
	leaq	.LC2(%rip), %rdi
	call	puts@PLT
	jmp	.L8
.L24:
	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	"%s"
.LC1:
	.string	"%c\n"
.LC2:
	.string	"None"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB23:
	.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
	leaq	-999424(%rsp), %r11
	.cfi_def_cfa 11, 999448
.LPSRL0:
	subq	$4096, %rsp
	orq	$0, (%rsp)
	cmpq	%r11, %rsp
	jne	.LPSRL0
	.cfi_def_cfa_register 7
	subq	$808, %rsp
	.cfi_def_cfa_offset 1000256
	movl	$26, %ecx
	movq	%fs:40, %rax
	movq	%rax, 1000216(%rsp)
	xorl	%eax, %eax
	movq	%rsp, %rbp
	leaq	208(%rsp), %rbx
	movq	%rbp, %rdi
	movq	%rbx, %rsi
	rep stosq
	leaq	.LC0(%rip), %rdi
	call	__isoc99_scanf@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L2
	movq	%rbx, %rdx
	leaq	(%rbx,%rax), %rcx
	.p2align 4,,10
	.p2align 3
.L3:
	movsbl	(%rdx), %eax
	addq	$1, %rdx
	subl	$97, %eax
	cltq
	addq	$1, (%rsp,%rax,8)
	cmpq	%rdx, %rcx
	jne	.L3
.L2:
	movq	%rbp, %rax
	jmp	.L5
	.p2align 4,,10
	.p2align 3
.L23:
	addq	$8, %rax
	cmpq	%rax, %rbx
	je	.L22
.L5:
	movq	(%rax), %rdx
	testq	%rdx, %rdx
	jne	.L23
	jmp	.L4
	.p2align 4,,10
	.p2align 3
.L7:
	addq	$1, %rdx
	cmpq	$26, %rdx
	je	.L8
.L4:
	cmpq	$0, 0(%rbp,%rdx,8)
	jne	.L7
	addq	$97, %rdx
	leaq	.LC1(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
.L8:
	movq	1000216(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L24
	addq	$1000232, %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
.L22:
	.cfi_restore_state
	leaq	.LC2(%rip), %rdi
	call	puts@PLT
	jmp	.L8
.L24:
	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:
```