user: Converte this assembly snippet into its equivalent C code:

```asm
<main>:
  endbr64
  push   %r12
  push   %rbp
  lea    D7(%rip),%rbp
  push   %rbx
  sub    $0x40,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x38(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbx
  lea    0x30(%rsp),%r12
L14:
  mov    %rbx,%rsi
  mov    %rbp,%rdi
  call   <scanf@plt>
  lea    0x4(%rbx),%rsi
  mov    %rbp,%rdi
  call   <scanf@plt>
  lea    0x8(%rbx),%rsi
  mov    %rbp,%rdi
  add    $0xc,%rbx
  call   <scanf@plt>
  cmp    %r12,%rbx
  jne    L14
  movslq 0xc(%rsp),%rdx
  mov    %rdx,%rax
  imul   $0x55555556,%rdx,%rdx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  shr    $0x20,%rdx
  sub    %ecx,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%eax
  movslq 0x18(%rsp),%rdx
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%esi
  sar    $0x1f,%esi
  shr    $0x20,%rdx
  sub    %esi,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  movslq 0x24(%rsp),%rdx
  or     %ecx,%eax
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%esi
  sar    $0x1f,%esi
  shr    $0x20,%rdx
  sub    %esi,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  movslq (%rsp),%rdx
  or     %ecx,%eax
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%esi
  sar    $0x1f,%esi
  shr    $0x20,%rdx
  sub    %esi,%edx
  xor    %esi,%esi
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  movslq 0x10(%rsp),%rdx
  or     %ecx,%eax
  setne  %sil
  mov    %rdx,%rax
  imul   $0x55555556,%rdx,%rdx
  mov    %eax,%ecx
  neg    %esi
  sar    $0x1f,%ecx
  shr    $0x20,%rdx
  sub    %ecx,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%eax
  movslq 0x1c(%rsp),%rdx
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%edi
  sar    $0x1f,%edi
  shr    $0x20,%rdx
  sub    %edi,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  movslq 0x28(%rsp),%rdx
  or     %ecx,%eax
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%edi
  sar    $0x1f,%edi
  shr    $0x20,%rdx
  sub    %edi,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  movslq 0x4(%rsp),%rdx
  or     %ecx,%eax
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%edi
  sar    $0x1f,%edi
  shr    $0x20,%rdx
  sub    %edi,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  movslq 0x20(%rsp),%rdx
  or     %ecx,%eax
  mov    $0x1,%eax
  cmove  %eax,%esi
  mov    %rdx,%rax
  imul   $0x55555556,%rdx,%rdx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  shr    $0x20,%rdx
  sub    %ecx,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%eax
  movslq 0x14(%rsp),%rdx
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%edi
  sar    $0x1f,%edi
  shr    $0x20,%rdx
  sub    %edi,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  movslq 0x2c(%rsp),%rdx
  or     %ecx,%eax
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%edi
  sar    $0x1f,%edi
  shr    $0x20,%rdx
  sub    %edi,%edx
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  movslq 0x8(%rsp),%rdx
  or     %ecx,%eax
  mov    %rdx,%rcx
  imul   $0x55555556,%rdx,%rdx
  mov    %ecx,%edi
  sar    $0x1f,%edi
  shr    $0x20,%rdx
  sub    %edi,%edx
  mov    %rbp,%rdi
  lea    (%rdx,%rdx,2),%edx
  sub    %edx,%ecx
  or     %ecx,%eax
  mov    $0x2,%eax
  cmove  %eax,%esi
  call   <printf@plt>
  mov    0x38(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L13
  add    $0x40,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L13:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_label: D7
type: string

tool: D7: %d

assistant: ```c
int main(void) {
  int a[4][3];
  for (int i = 0; i < 4; i++) {
    for (int j = 0; j < 3; j++) {
      scanf("%d", &a[i][j]);
    }
  }
  int col = -1;
  for (int i = 0; i < 3; i++) {
    int valid = 1;
    for (int j = 0; j < 4; j++) {
      if (a[j][i] % 3 != 0) {
        valid = 0;
      }
    }
    if (valid)
      col = i;
  }
  printf("%d", col);
  return 0;
}
```