user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r12
  lea    D65(%rip),%r12
  push   %rbp
  sub    $0xb8,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0xa8(%rsp)
  xor    %eax,%eax
  lea    0x11(%rsp),%rdi
  mov    $0x63,%eax
  movl   $0x62616362,0x11(%rsp)
  mov    %ax,0x15(%rsp)
  movl   $0x636261,0x8(%rsp)
  call   <removeDuplicateLetters@plt>
  lea    0x8(%rsp),%rdi
  mov    %rax,%rsi
  mov    %rax,%rbp
  call   <strcmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  lea    D67(%rip),%rdi
  call   <printf@plt>
  mov    %rbp,%rdi
  call   <free@plt>
  lea    0x17(%rsp),%rdi
  movb   $0x0,0x1f(%rsp)
  movabs $0x6362636463616263,%rax
  mov    %rax,0x17(%rsp)
  movl   $0x62646361,0xc(%rsp)
  movb   $0x0,0x10(%rsp)
  call   <removeDuplicateLetters@plt>
  lea    0xc(%rsp),%rdi
  mov    %rax,%rsi
  mov    %rax,%rbp
  call   <strcmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  mov    %r12,%rdi
  call   <printf@plt>
  mov    %rbp,%rdi
  call   <free@plt>
  mov    $0x7a6b,%edx
  lea    0x60(%rsp),%rdi
  movdqa D36(%rip),%xmm0
  movabs $0x6669716564766565,%rax
  mov    %dx,0x78(%rsp)
  movaps %xmm0,0x60(%rsp)
  movdqa D12(%rip),%xmm0
  mov    %rax,0x70(%rsp)
  movaps %xmm0,0x20(%rsp)
  movb   $0x0,0x7a(%rsp)
  movb   $0x0,0x30(%rsp)
  call   <removeDuplicateLetters@plt>
  lea    0x20(%rsp),%rdi
  mov    %rax,%rsi
  mov    %rax,%rbp
  call   <strcmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  mov    %r12,%rdi
  call   <printf@plt>
  mov    %rbp,%rdi
  call   <free@plt>
  movdqa D51(%rip),%xmm0
  lea    0x80(%rsp),%rdi
  movl   $0x63696274,0xa0(%rsp)
  movb   $0x0,0xa4(%rsp)
  movaps %xmm0,0x80(%rsp)
  movdqa D40(%rip),%xmm0
  movl   $0x637578,0x50(%rsp)
  movaps %xmm0,0x90(%rsp)
  movdqa D16(%rip),%xmm0
  movaps %xmm0,0x40(%rsp)
  call   <removeDuplicateLetters@plt>
  lea    0x40(%rsp),%rdi
  mov    %rax,%rsi
  mov    %rax,%rbp
  call   <strcmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  mov    %r12,%rdi
  call   <printf@plt>
  mov    %rbp,%rdi
  call   <free@plt>
  mov    0xa8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L4
  add    $0xb8,%rsp
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
L4:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: label: D65
type_guessed: string
name: retrieve_data
arguments: label: D67
type_guessed: string
name: retrieve_data
arguments: label: D36
type_guessed: byte[16]
name: retrieve_data
arguments: label: D12
type_guessed: byte[16]
name: retrieve_data
arguments: label: D51
type_guessed: byte[16]
name: retrieve_data
arguments: label: D40
type_guessed: byte[16]
name: retrieve_data
arguments: label: D16
type_guessed: byte[16]

tool: D65: Second case: OK


tool: D67: First case: OK


tool: {"D36": [0x74,0x68,0x65,0x73,0x71,0x74,0x69,0x74,0x78,0x79,0x65,0x74,0x70,0x78,0x6c,0x6f]}

tool: {"D12": [0x68,0x65,0x73,0x69,0x74,0x78,0x79,0x70,0x6c,0x6f,0x76,0x64,0x71,0x66,0x6b,0x7a]}

tool: {"D51": [0x6d,0x69,0x74,0x6e,0x6c,0x72,0x75,0x68,0x7a,0x6e,0x6a,0x66,0x79,0x7a,0x6d,0x74]}

tool: {"D40": [0x6d,0x66,0x6e,0x73,0x74,0x73,0x78,0x77,0x6b,0x74,0x78,0x6c,0x62,0x6f,0x78,0x75]}

tool: {"D16": [0x69,0x6c,0x72,0x68,0x6a,0x66,0x79,0x7a,0x6d,0x6e,0x73,0x74,0x77,0x6b,0x62,0x6f]}

assistant: ```c
int main() {
  char s1[] = "bcabc";
  char expected1[] = "abc";
  char *result1 = removeDuplicateLetters(s1);
  assert(strcmp(expected1, result1) == 0);
  printf("First case: OK\n");
  free(result1);
  char s2[] = "cbacdcbc";
  char expected2[] = "acdb";
  char *result2 = removeDuplicateLetters(s2);
  assert(strcmp(expected2, result2) == 0);
  printf("Second case: OK\n");
  free(result2);
  char s3[] = "thesqtitxyetpxloeevdeqifkz";
  char expected3[] = "hesitxyplovdqfkz";
  char *result3 = removeDuplicateLetters(s3);
  assert(strcmp(expected3, result3) == 0);
  printf("Second case: OK\n");
  free(result3);
  char s4[] = "mitnlruhznjfyzmtmfnstsxwktxlboxutbic";
  char expected4[] = "ilrhjfyzmnstwkboxuc";
  char *result4 = removeDuplicateLetters(s4);
  assert(strcmp(expected4, result4) == 0);
  printf("Second case: OK\n");
  free(result4);
  return 0;
}
```