user: What is the c source code of the assembly code below?

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  lea    -0x20000(%rsp),%r11
L127:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L127
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x20008(%rsp)
  xor    %eax,%eax
  lea    0x4(%rsp),%rsi
  lea    D12(%rip),%rdi
  call   <scanf@plt>
  mov    0x4(%rsp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,0x4(%rsp)
  test   %eax,%eax
  je     L168
  lea    D11(%rip),%r14
  jmp    L165
L104:
  lea    (%rbx,%rbp,1),%rsi
  mov    %r14,%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  movsbl 0x0(%rbp,%rbx,1),%eax
  sub    $0x41,%eax
  cltq
  movslq %ebx,%rcx
  lea    0x0(,%rcx,4),%rdx
  lea    (%rdx,%rcx,1),%rsi
  lea    (%rax,%rsi,4),%rsi
  mov    0xc780(%rsp,%rsi,4),%eax
  add    $0x1,%eax
  mov    %eax,0xc780(%rsp,%rsi,4)
  add    $0x1,%rbx
  cmp    %ebx,0xc(%rsp)
  jg     L104
L3:
  mov    $0x0,%eax
  call   <getchar@plt>
  add    $0x1,%r12d
  add    $0x3e9,%rbp
  cmp    %r12d,0x8(%rsp)
  jle    L177
L46:
  mov    $0x0,%ebx
  cmpl   $0x0,0xc(%rsp)
  jg     L104
  jmp    L3
L177:
  cmpl   $0x0,0xc(%rsp)
  jle    L179
  lea    0xc780(%rsp),%r12
  mov    $0x0,%r15d
  mov    $0x0,%ebx
  jmp    L120
L133:
  add    %edx,%ebx
  add    $0x1,%rax
  cmp    $0x14,%rax
  je     L38
L65:
  mov    (%r12,%rax,4),%edx
  cmp    %ebp,%edx
  jle    L133
  mov    %eax,%r13d
  mov    %edx,%ebp
  jmp    L133
L38:
  lea    0x41(%r13),%edi
  movsbl %dil,%edi
  call   <putchar@plt>
  sub    %ebp,%ebx
  add    $0x1,%r15d
  add    $0x50,%r12
  cmp    %r15d,0xc(%rsp)
  jle    L18
L120:
  mov    $0x0,%eax
  mov    $0x0,%ebp
  jmp    L65
L179:
  mov    $0x0,%ebx
L18:
  mov    %ebx,%esi
  lea    D0(%rip),%rdi
  call   <printf@plt>
  mov    0x4(%rsp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,0x4(%rsp)
  test   %eax,%eax
  je     L168
L165:
  lea    0xc(%rsp),%rdx
  lea    0x8(%rsp),%rsi
  lea    D4(%rip),%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  mov    0xc(%rsp),%eax
  lea    (%rax,%rax,4),%edx
  shl    $0x4,%edx
  lea    0xc780(%rsp),%rdi
  mov    $0x0,%esi
  call   <memset@plt>
  mov    $0x0,%eax
  call   <getchar@plt>
  cmpl   $0x0,0x8(%rsp)
  jle    L177
  lea    0x10(%rsp),%rbp
  mov    $0x0,%r12d
  jmp    L46
L168:
  mov    0x20008(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L101
  mov    $0x0,%eax
  add    $0x20018,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L101:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_label: D12
type: string
name: retrieve_data
arguments: data_label: D11
type: string
name: retrieve_data
arguments: data_label: D0
type: string
name: retrieve_data
arguments: data_label: D4
type: string

tool: D12: %d

tool: D11: %c

tool: D0: 
%d


tool: D4: %d%d

assistant: ```c
int main() {
  int T, row, column, distance, i, j, frequency[1000]['T' - 'A' + 1], max;
  char DNA[51][1001], letter;
  scanf("%d", &T);
  while (T--) {
    distance = 0;
    scanf("%d%d", &row, &column);
    memset(frequency, 0, sizeof(int) * column * ('T' - 'A' + 1));
    getchar();
    for (i = 0; i < row; i++) {
      for (j = 0; j < column; j++) {
        scanf("%c", &DNA[i][j]);
        frequency[j][DNA[i][j] - 'A']++;
      }
      getchar();
    }
    for (j = 0; j < column; j++) {
      max = 0;
      for (i = 0; i < 'T' - 'A' + 1; i++) {
        if (frequency[j][i] > max) {
          max = frequency[j][i];
          letter = i;
        }
        distance += frequency[j][i];
      }
      putchar(letter + 'A');
      distance -= max;
    }
    printf("\n%d\n", distance);
  }
  return 0;
}
```