user: What would the C source look like for the assembly code provided here?

```asm
<main>:
  endbr64
  push   %r15
  mov    $0x3,%edi
  push   %r14
  push   %r13
  push   %r12
  lea    D21(%rip),%r12
  push   %rbp
  lea    D9(%rip),%rbp
  push   %rbx
  sub    $0x8,%rsp
  call   <malloc@plt>
  mov    %rax,%rbx
  nopl   (%rax)
L7:
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %al,(%rbx)
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %al,0x1(%rbx)
  xor    %eax,%eax
  call   <getchar@plt>
  movsbl 0x1(%rbx),%edx
  movsbl (%rbx),%esi
  mov    %r12,%rdi
  mov    %al,0x2(%rbx)
  movsbl %al,%ecx
  xor    %eax,%eax
  call   <printf@plt>
  movsbl 0x2(%rbx),%ecx
  sub    $0x8,%rsp
  movsbl (%rbx),%eax
  movsbl 0x1(%rbx),%edx
  mov    %ecx,%r15d
  mov    %ecx,%r14d
  mov    %eax,%r11d
  mov    %eax,%r10d
  and    $0x1,%r15d
  shr    $0x7,%r14b
  mov    %eax,%r9d
  mov    %eax,%r8d
  push   %r15
  mov    %ecx,%r15d
  movzbl %r14b,%r14d
  sar    $0x5,%r11d
  sar    %r15d
  sar    $0x6,%r10d
  mov    %eax,%esi
  and    $0x1,%r11d
  and    $0x1,%r15d
  and    $0x1,%r10d
  sar    $0x3,%r9d
  mov    %edx,%edi
  push   %r15
  mov    %ecx,%r15d
  sar    $0x4,%r8d
  mov    %eax,%r13d
  sar    $0x2,%r15d
  shr    $0x7,%sil
  and    $0x1,%r15d
  movzbl %sil,%esi
  push   %r15
  mov    %ecx,%r15d
  sar    $0x3,%r15d
  and    $0x1,%r15d
  push   %r15
  mov    %ecx,%r15d
  sar    $0x4,%r15d
  and    $0x1,%r15d
  push   %r15
  mov    %ecx,%r15d
  sar    $0x6,%ecx
  sar    $0x5,%r15d
  and    $0x1,%ecx
  and    $0x1,%r15d
  push   %r15
  push   %rcx
  mov    %edx,%ecx
  and    $0x1,%ecx
  push   %r14
  push   %rcx
  mov    %edx,%ecx
  sar    %ecx
  and    $0x1,%ecx
  shr    $0x7,%dil
  and    $0x1,%r13d
  and    $0x1,%r9d
  push   %rcx
  mov    %edx,%ecx
  movzbl %dil,%edi
  and    $0x1,%r8d
  sar    $0x2,%ecx
  and    $0x1,%ecx
  push   %rcx
  mov    %edx,%ecx
  sar    $0x3,%ecx
  and    $0x1,%ecx
  push   %rcx
  mov    %edx,%ecx
  sar    $0x4,%ecx
  and    $0x1,%ecx
  push   %rcx
  mov    %edx,%ecx
  sar    $0x6,%edx
  sar    $0x5,%ecx
  and    $0x1,%edx
  and    $0x1,%ecx
  push   %rcx
  mov    %r11d,%ecx
  push   %rdx
  mov    %eax,%edx
  sar    $0x2,%eax
  sar    %edx
  and    $0x1,%eax
  push   %rdi
  mov    %rbp,%rdi
  and    $0x1,%edx
  push   %r13
  push   %rdx
  mov    %r10d,%edx
  push   %rax
  xor    %eax,%eax
  call   <printf@plt>
  movsbl 0x2(%rbx),%ecx
  movsbl 0x1(%rbx),%edx
  xor    %eax,%eax
  movsbl (%rbx),%esi
  add    $0xa0,%rsp
  lea    D25(%rip),%rdi
  call   <printf@plt>
  jmp    L7
```

tool_calls: name: extract_symbolic_data
arguments: label: D21
type_guessed: string
name: extract_symbolic_data
arguments: label: D9
type_guessed: string
name: extract_symbolic_data
arguments: label: D25
type_guessed: string

tool: D21: %2x %2x %2x 

tool: D9: : %d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d 

tool: D25: : %d %d %d


assistant: ```c
int main(int argc, char **argv) {
  signed char *c = malloc(3 * sizeof(char)), i;
  while (1) {
    for (i = 0; i < 3; i++)
      c[i] = getchar();
    printf("%2x %2x %2x ", (unsigned char)c[0], (unsigned char)c[1], (unsigned char)c[2]);
    printf(": "
           "%d%d%d%d%d%d%d%d"
           "%d%d%d%d%d%d%d%d"
           "%d%d%d%d%d%d%d%d"
           " ",
           (c[0] & 0x80 ? 1 : 0), (c[0] & 0x40 ? 1 : 0), (c[0] & 0x20 ? 1 : 0), (c[0] & 0x10 ? 1 : 0), (c[0] & 0x08 ? 1 : 0), (c[0] & 0x04 ? 1 : 0), (c[0] & 0x02 ? 1 : 0), (c[0] & 0x01 ? 1 : 0), (c[1] & 0x80 ? 1 : 0), (c[1] & 0x40 ? 1 : 0), (c[1] & 0x20 ? 1 : 0), (c[1] & 0x10 ? 1 : 0), (c[1] & 0x08 ? 1 : 0), (c[1] & 0x04 ? 1 : 0), (c[1] & 0x02 ? 1 : 0), (c[1] & 0x01 ? 1 : 0), (c[2] & 0x80 ? 1 : 0), (c[2] & 0x40 ? 1 : 0), (c[2] & 0x20 ? 1 : 0), (c[2] & 0x10 ? 1 : 0), (c[2] & 0x08 ? 1 : 0), (c[2] & 0x04 ? 1 : 0), (c[2] & 0x02 ? 1 : 0), (c[2] & 0x01 ? 1 : 0));
    printf(": %d %d %d\n", (signed char)c[0], (signed char)c[1], (signed char)c[2]);
  }
  return 0;
}
```