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 <stdlib.h>
#include <string.h>

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

  for (;;) {
    int curr, next;
    int res;
    int n;

    scanf("%d", &n);
    if (n == 0) break ;

    curr = 0; next = 3;
    res = 0;
    for (i = 0; i < n; ++i) {
      char cmd[4];

      scanf(" %s", cmd);
      if (strcmp(cmd, "lu") == 0) {
	curr = curr | 2;
      }
      if (strcmp(cmd, "ru") == 0) {
	curr = curr | 1;
      }
      if (strcmp(cmd, "ld") == 0) {
	curr = curr & ~2;
      }
      if (strcmp(cmd, "rd") == 0) {
	curr = curr & ~1;
      }
      
      if (curr == next) {
	++res;
	next = (next == 0 ? 3 : 0);
      }
    }
    printf("%d\n", res);
  }


  return (EXIT_SUCCESS);
}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d"
.LC1:
	.string	" %s"
.LC2:
	.string	"lu"
.LC3:
	.string	"ru"
.LC4:
	.string	"ld"
.LC5:
	.string	"rd"
.LC6:
	.string	"%d\n"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	leaq	.LC1(%rip), %rbp
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	leaq	20(%rsp), %r15
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L18:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	movl	$0, %r12d
	jle	.L3
	movl	$3, %ebx
	xorl	%r14d, %r14d
	xorl	%r13d, %r13d
	jmp	.L17
	.p2align 4,,10
	.p2align 3
.L6:
	cmpw	$30066, (%r15)
	je	.L25
.L9:
	cmpw	$25708, (%r15)
	je	.L26
.L12:
	cmpw	$25714, (%r15)
	je	.L27
.L15:
	cmpl	%ebx, %r14d
	jne	.L16
	addl	$1, %r12d
	cmpl	$1, %r14d
	sbbl	%ebx, %ebx
	andl	$3, %ebx
.L16:
	addl	$1, %r13d
	cmpl	%r13d, 16(%rsp)
	jle	.L3
.L17:
	xorl	%eax, %eax
	movq	%r15, %rsi
	movq	%rbp, %rdi
	call	__isoc99_scanf@PLT
	cmpw	$30060, (%r15)
	jne	.L6
	cmpb	$0, 2(%r15)
	jne	.L6
	orl	$2, %r14d
	cmpw	$30066, (%r15)
	jne	.L9
	.p2align 4,,10
	.p2align 3
.L25:
	cmpb	$0, 2(%r15)
	jne	.L9
	orl	$1, %r14d
	cmpw	$25708, (%r15)
	jne	.L12
	.p2align 4,,10
	.p2align 3
.L26:
	cmpb	$0, 2(%r15)
	jne	.L12
	andl	$-3, %r14d
	cmpw	$25714, (%r15)
	jne	.L15
	.p2align 4,,10
	.p2align 3
.L27:
	cmpb	$0, 2(%r15)
	jne	.L15
	andl	$-2, %r14d
	jmp	.L15
	.p2align 4,,10
	.p2align 3
.L3:
	movl	%r12d, %edx
	leaq	.LC6(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L18
	.p2align 4,,10
	.p2align 3
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L28
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L28:
	.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	"%d"
.LC1:
	.string	" %s"
.LC2:
	.string	"lu"
.LC3:
	.string	"ru"
.LC4:
	.string	"ld"
.LC5:
	.string	"rd"
.LC6:
	.string	"%d\n"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	leaq	.LC1(%rip), %rbp
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	leaq	20(%rsp), %r15
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L18:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	movl	$0, %r12d
	jle	.L3
	movl	$3, %ebx
	xorl	%r14d, %r14d
	xorl	%r13d, %r13d
	jmp	.L17
	.p2align 4,,10
	.p2align 3
.L6:
	cmpw	$30066, (%r15)
	je	.L25
.L9:
	cmpw	$25708, (%r15)
	je	.L26
.L12:
	cmpw	$25714, (%r15)
	je	.L27
.L15:
	cmpl	%ebx, %r14d
	jne	.L16
	addl	$1, %r12d
	cmpl	$1, %r14d
	sbbl	%ebx, %ebx
	andl	$3, %ebx
.L16:
	addl	$1, %r13d
	cmpl	%r13d, 16(%rsp)
	jle	.L3
.L17:
	xorl	%eax, %eax
	movq	%r15, %rsi
	movq	%rbp, %rdi
	call	__isoc99_scanf@PLT
	cmpw	$30060, (%r15)
	jne	.L6
	cmpb	$0, 2(%r15)
	jne	.L6
	orl	$2, %r14d
	cmpw	$30066, (%r15)
	jne	.L9
	.p2align 4,,10
	.p2align 3
.L25:
	cmpb	$0, 2(%r15)
	jne	.L9
	orl	$1, %r14d
	cmpw	$25708, (%r15)
	jne	.L12
	.p2align 4,,10
	.p2align 3
.L26:
	cmpb	$0, 2(%r15)
	jne	.L12
	andl	$-3, %r14d
	cmpw	$25714, (%r15)
	jne	.L15
	.p2align 4,,10
	.p2align 3
.L27:
	cmpb	$0, 2(%r15)
	jne	.L15
	andl	$-2, %r14d
	jmp	.L15
	.p2align 4,,10
	.p2align 3
.L3:
	movl	%r12d, %edx
	leaq	.LC6(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L18
	.p2align 4,,10
	.p2align 3
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L28
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L28:
	.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	"%d"
.LC1:
	.string	" %s"
.LC2:
	.string	"lu"
.LC3:
	.string	"ru"
.LC4:
	.string	"ld"
.LC5:
	.string	"rd"
.LC6:
	.string	"%d\n"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	leaq	.LC1(%rip), %rbp
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	leaq	20(%rsp), %r15
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L18:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	movl	$0, %r12d
	jle	.L3
	movl	$3, %ebx
	xorl	%r14d, %r14d
	xorl	%r13d, %r13d
	jmp	.L17
	.p2align 4,,10
	.p2align 3
.L6:
	cmpw	$30066, (%r15)
	je	.L25
.L9:
	cmpw	$25708, (%r15)
	je	.L26
.L12:
	cmpw	$25714, (%r15)
	je	.L27
.L15:
	cmpl	%ebx, %r14d
	jne	.L16
	addl	$1, %r12d
	cmpl	$1, %r14d
	sbbl	%ebx, %ebx
	andl	$3, %ebx
.L16:
	addl	$1, %r13d
	cmpl	%r13d, 16(%rsp)
	jle	.L3
.L17:
	xorl	%eax, %eax
	movq	%r15, %rsi
	movq	%rbp, %rdi
	call	__isoc99_scanf@PLT
	cmpw	$30060, (%r15)
	jne	.L6
	cmpb	$0, 2(%r15)
	jne	.L6
	orl	$2, %r14d
	cmpw	$30066, (%r15)
	jne	.L9
	.p2align 4,,10
	.p2align 3
.L25:
	cmpb	$0, 2(%r15)
	jne	.L9
	orl	$1, %r14d
	cmpw	$25708, (%r15)
	jne	.L12
	.p2align 4,,10
	.p2align 3
.L26:
	cmpb	$0, 2(%r15)
	jne	.L12
	andl	$-3, %r14d
	cmpw	$25714, (%r15)
	jne	.L15
	.p2align 4,,10
	.p2align 3
.L27:
	cmpb	$0, 2(%r15)
	jne	.L15
	andl	$-2, %r14d
	jmp	.L15
	.p2align 4,,10
	.p2align 3
.L3:
	movl	%r12d, %edx
	leaq	.LC6(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L18
	.p2align 4,,10
	.p2align 3
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L28
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L28:
	.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
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

  for (;;) {
    int curr, next;
    int res;
    int n;

    scanf("%d", &n);
    if (n == 0) break ;

    curr = 0; next = 3;
    res = 0;
    for (i = 0; i < n; ++i) {
      char cmd[4];

      scanf(" %s", cmd);
      if (strcmp(cmd, "lu") == 0) {
	curr = curr | 2;
      }
      if (strcmp(cmd, "ru") == 0) {
	curr = curr | 1;
      }
      if (strcmp(cmd, "ld") == 0) {
	curr = curr & ~2;
      }
      if (strcmp(cmd, "rd") == 0) {
	curr = curr & ~1;
      }
      
      if (curr == next) {
	++res;
	next = (next == 0 ? 3 : 0);
      }
    }
    printf("%d\n", res);
  }


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

```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

  for (;;) {
    int curr, next;
    int res;
    int n;

    scanf("%d", &n);
    if (n == 0) break ;

    curr = 0; next = 3;
    res = 0;
    for (i = 0; i < n; ++i) {
      char cmd[4];

      scanf(" %s", cmd);
      if (strcmp(cmd, "lu") == 0) {
	curr = curr | 2;
      }
      if (strcmp(cmd, "ru") == 0) {
	curr = curr | 1;
      }
      if (strcmp(cmd, "ld") == 0) {
	curr = curr & ~2;
      }
      if (strcmp(cmd, "rd") == 0) {
	curr = curr & ~1;
      }
      
      if (curr == next) {
	++res;
	next = (next == 0 ? 3 : 0);
      }
    }
    printf("%d\n", res);
  }


  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:

4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld rd ru rd ru lu rd ld
0
 4
lu ru ld rd
0
lu ld lu ru
0
ul
10
vr lu ld rd rv rd ru lu rc kd
0
 4
lu ru ld rd
4
lu ld lu ru
0
ul
10
ru lu ld rd ru rd ru lu rd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld rd su rd ru lu rd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
ul
10
ru lu ld rd rt rd ru lu rd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld rd su rd ru lu sd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
ul
10
ru lu ld rd rt dr ru lu rd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld dr su rd ru lu sd ld
0
 4
lu ru ld rd
4
lu ld lu ru
0
ul
10
ru lu ld rd rt dr ru lu rd dl
0
 4
lu ru ld rd
4
lu ld lu ru
0
lu
10
ru lu ld rd ru rd ru lu rc ld
0

2
1
 2
 2
1
 2
1
 2
1
 2
1
 2
1
 2
1
 2
1
 2
1

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 <stdlib.h>
#include <string.h>

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

  for (;;) {
    int curr, next;
    int res;
    int n;

    scanf("%d", &n);
    if (n == 0) break ;

    curr = 0; next = 3;
    res = 0;
    for (i = 0; i < n; ++i) {
      char cmd[4];

      scanf(" %s", cmd);
      if (strcmp(cmd, "lu") == 0) {
	curr = curr | 2;
      }
      if (strcmp(cmd, "ru") == 0) {
	curr = curr | 1;
      }
      if (strcmp(cmd, "ld") == 0) {
	curr = curr & ~2;
      }
      if (strcmp(cmd, "rd") == 0) {
	curr = curr & ~1;
      }
      
      if (curr == next) {
	++res;
	next = (next == 0 ? 3 : 0);
      }
    }
    printf("%d\n", res);
  }


  return (EXIT_SUCCESS);
}```

Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d"
.LC1:
	.string	" %s"
.LC2:
	.string	"lu"
.LC3:
	.string	"ru"
.LC4:
	.string	"ld"
.LC5:
	.string	"rd"
.LC6:
	.string	"%d\n"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	leaq	.LC1(%rip), %rbp
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	leaq	20(%rsp), %r15
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L18:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	movl	$0, %r12d
	jle	.L3
	movl	$3, %ebx
	xorl	%r14d, %r14d
	xorl	%r13d, %r13d
	jmp	.L17
	.p2align 4,,10
	.p2align 3
.L6:
	cmpw	$30066, (%r15)
	je	.L25
.L9:
	cmpw	$25708, (%r15)
	je	.L26
.L12:
	cmpw	$25714, (%r15)
	je	.L27
.L15:
	cmpl	%ebx, %r14d
	jne	.L16
	addl	$1, %r12d
	cmpl	$1, %r14d
	sbbl	%ebx, %ebx
	andl	$3, %ebx
.L16:
	addl	$1, %r13d
	cmpl	%r13d, 16(%rsp)
	jle	.L3
.L17:
	xorl	%eax, %eax
	movq	%r15, %rsi
	movq	%rbp, %rdi
	call	__isoc99_scanf@PLT
	cmpw	$30060, (%r15)
	jne	.L6
	cmpb	$0, 2(%r15)
	jne	.L6
	orl	$2, %r14d
	cmpw	$30066, (%r15)
	jne	.L9
	.p2align 4,,10
	.p2align 3
.L25:
	cmpb	$0, 2(%r15)
	jne	.L9
	orl	$1, %r14d
	cmpw	$25708, (%r15)
	jne	.L12
	.p2align 4,,10
	.p2align 3
.L26:
	cmpb	$0, 2(%r15)
	jne	.L12
	andl	$-3, %r14d
	cmpw	$25714, (%r15)
	jne	.L15
	.p2align 4,,10
	.p2align 3
.L27:
	cmpb	$0, 2(%r15)
	jne	.L15
	andl	$-2, %r14d
	jmp	.L15
	.p2align 4,,10
	.p2align 3
.L3:
	movl	%r12d, %edx
	leaq	.LC6(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L18
	.p2align 4,,10
	.p2align 3
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L28
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L28:
	.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	"%d"
.LC1:
	.string	" %s"
.LC2:
	.string	"lu"
.LC3:
	.string	"ru"
.LC4:
	.string	"ld"
.LC5:
	.string	"rd"
.LC6:
	.string	"%d\n"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB51:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	leaq	.LC1(%rip), %rbp
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	subq	$40, %rsp
	.cfi_def_cfa_offset 96
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rax
	leaq	20(%rsp), %r15
	movq	%rax, 8(%rsp)
	.p2align 4,,10
	.p2align 3
.L18:
	movq	8(%rsp), %rsi
	leaq	.LC0(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc99_scanf@PLT
	movl	16(%rsp), %eax
	testl	%eax, %eax
	je	.L2
	movl	$0, %r12d
	jle	.L3
	movl	$3, %ebx
	xorl	%r14d, %r14d
	xorl	%r13d, %r13d
	jmp	.L17
	.p2align 4,,10
	.p2align 3
.L6:
	cmpw	$30066, (%r15)
	je	.L25
.L9:
	cmpw	$25708, (%r15)
	je	.L26
.L12:
	cmpw	$25714, (%r15)
	je	.L27
.L15:
	cmpl	%ebx, %r14d
	jne	.L16
	addl	$1, %r12d
	cmpl	$1, %r14d
	sbbl	%ebx, %ebx
	andl	$3, %ebx
.L16:
	addl	$1, %r13d
	cmpl	%r13d, 16(%rsp)
	jle	.L3
.L17:
	xorl	%eax, %eax
	movq	%r15, %rsi
	movq	%rbp, %rdi
	call	__isoc99_scanf@PLT
	cmpw	$30060, (%r15)
	jne	.L6
	cmpb	$0, 2(%r15)
	jne	.L6
	orl	$2, %r14d
	cmpw	$30066, (%r15)
	jne	.L9
	.p2align 4,,10
	.p2align 3
.L25:
	cmpb	$0, 2(%r15)
	jne	.L9
	orl	$1, %r14d
	cmpw	$25708, (%r15)
	jne	.L12
	.p2align 4,,10
	.p2align 3
.L26:
	cmpb	$0, 2(%r15)
	jne	.L12
	andl	$-3, %r14d
	cmpw	$25714, (%r15)
	jne	.L15
	.p2align 4,,10
	.p2align 3
.L27:
	cmpb	$0, 2(%r15)
	jne	.L15
	andl	$-2, %r14d
	jmp	.L15
	.p2align 4,,10
	.p2align 3
.L3:
	movl	%r12d, %edx
	leaq	.LC6(%rip), %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L18
	.p2align 4,,10
	.p2align 3
.L2:
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L28
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	ret
.L28:
	.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:
```