user: Demonstrate the C code that generates the assembly output below:

```asm
<findBlock>:
  endbr64
  mov    %rdi,%rdx
  mov    %rdi,%rax
  xor    %ecx,%ecx
L76:
  movzbl (%rax),%edi
  movzbl 0x1(%rax),%r9d
  xor    %esi,%esi
  mov    %ecx,%r8d
  movzbl 0x2(%rax),%r10d
  cmp    $0x78,%dil
  sete   %sil
  cmp    $0x78,%r9b
  je     L365
  cmp    $0x78,%r10b
  je     L60
L251:
  add    $0x3,%ecx
  add    $0x3,%rax
  cmp    $0x9,%ecx
  jne    L76
  xor    %eax,%eax
L339:
  movzbl (%rdx,%rax,1),%esi
  movzbl 0x3(%rdx,%rax,1),%edi
  xor    %ecx,%ecx
  mov    %eax,%r8d
  movzbl 0x6(%rdx,%rax,1),%r9d
  lea    0x3(%rax),%r11d
  lea    0x6(%rax),%r10d
  cmp    $0x78,%sil
  sete   %cl
  cmp    $0x78,%dil
  je     L363
  cmp    $0x78,%r9b
  je     L123
L252:
  add    $0x1,%rax
  cmp    $0x3,%rax
  jne    L339
  movzbl (%rdx),%esi
  movzbl 0x8(%rdx),%ecx
  movzbl 0x4(%rdx),%eax
  cmp    $0x78,%sil
  je     L322
  cmp    $0x78,%al
  je     L79
  cmp    $0x78,%cl
  je     L296
L382:
  cmpb   $0x78,0x2(%rdx)
  je     L65
L266:
  mov    $0xffffffff,%r8d
L138:
  mov    %r8d,%eax
  ret
  nopl   0x0(%rax,%rax,1)
L365:
  add    $0x1,%esi
  cmp    $0x78,%r10b
  jne    L72
L60:
  add    $0x1,%esi
L72:
  cmp    $0x2,%esi
  jne    L251
  cmp    $0x20,%dil
  je     L138
  cmp    $0x20,%r9b
  je     L305
  cmp    $0x20,%r10b
  jne    L251
  lea    0x2(%rcx),%r8d
  jmp    L138
  nopl   (%rax)
L363:
  add    $0x1,%ecx
  cmp    $0x78,%r9b
  jne    L330
L123:
  add    $0x1,%ecx
L330:
  cmp    $0x2,%ecx
  jne    L252
  cmp    $0x20,%sil
  je     L138
  cmp    $0x20,%dil
  je     L312
  cmp    $0x20,%r9b
  jne    L252
  mov    %r10d,%r8d
  jmp    L138
  nopl   0x0(%rax)
L322:
  cmp    $0x78,%al
  je     L240
  cmp    $0x78,%cl
  jne    L382
  mov    $0x4,%r8d
  cmp    $0x20,%al
  je     L138
L296:
  movzbl 0x2(%rdx),%ecx
  cmp    $0x78,%cl
  je     L65
  cmp    $0x78,%al
  jne    L266
  jmp    L155
  cs nopw 0x0(%rax,%rax,1)
L79:
  cmp    $0x78,%cl
  jne    L221
  xor    %r8d,%r8d
  cmp    $0x20,%sil
  je     L138
L221:
  movzbl 0x2(%rdx),%ecx
  cmp    $0x78,%cl
  je     L380
L155:
  cmpb   $0x78,0x6(%rdx)
  jne    L266
  xor    %r8d,%r8d
  cmp    $0x20,%cl
  sete   %r8b
  lea    -0x1(%r8,%r8,2),%r8d
  mov    %r8d,%eax
  ret
  nopl   0x0(%rax,%rax,1)
L240:
  cmp    $0x78,%cl
  je     L221
  cmp    $0x20,%cl
  jne    L221
  mov    $0x8,%r8d
  jmp    L138
  nopl   (%rax)
L65:
  cmpb   $0x78,0x6(%rdx)
  jne    L266
  xor    %r8d,%r8d
  cmp    $0x20,%al
  sete   %r8b
  lea    -0x1(%r8,%r8,4),%r8d
  jmp    L138
  nopl   (%rax)
L380:
  movzbl 0x6(%rdx),%eax
  cmp    $0x78,%al
  je     L266
  cmp    $0x20,%al
  mov    $0xffffffff,%r8d
  mov    $0x6,%eax
  cmove  %eax,%r8d
  mov    %r8d,%eax
  ret
L305:
  lea    0x1(%rcx),%r8d
  jmp    L138
L312:
  mov    %r11d,%r8d
  jmp    L138
```

assistant: ```c
int findBlock(char *playground) {
  int count = 0;
  int p;
  for (p = 0; p < 3; p++) {
    if (playground[p * 3 + 0] == 'x')
      count += 1;
    if (playground[p * 3 + 1] == 'x')
      count += 1;
    if (playground[p * 3 + 2] == 'x')
      count += 1;
    if (count == 2) {
      if (playground[p * 3 + 0] == ' ')
        return p * 3 + 0;
      if (playground[p * 3 + 1] == ' ')
        return p * 3 + 1;
      if (playground[p * 3 + 2] == ' ')
        return p * 3 + 2;
    }
    count = 0;
  }
  for (p = 0; p < 3; p++) {
    if (playground[3 * 0 + p] == 'x')
      count += 1;
    if (playground[3 * 1 + p] == 'x')
      count += 1;
    if (playground[3 * 2 + p] == 'x')
      count += 1;
    if (count == 2) {
      if (playground[3 * 0 + p] == ' ')
        return 3 * 0 + p;
      if (playground[3 * 1 + p] == ' ')
        return 3 * 1 + p;
      if (playground[3 * 2 + p] == ' ')
        return 3 * 2 + p;
    }
    count = 0;
  }
  if (playground[3 * 0 + 0] == 'x')
    count += 1;
  if (playground[3 * 1 + 1] == 'x')
    count += 1;
  if (playground[3 * 2 + 2] == 'x')
    count += 1;
  if (count == 2) {
    if (playground[3 * 0 + 0] == ' ')
      return 3 * 0 + 0;
    if (playground[3 * 1 + 1] == ' ')
      return 3 * 1 + 1;
    if (playground[3 * 2 + 2] == ' ')
      return 3 * 2 + 2;
  }
  count = 0;
  if (playground[3 * 0 + 2] == 'x')
    count += 1;
  if (playground[3 * 1 + 1] == 'x')
    count += 1;
  if (playground[3 * 2 + 0] == 'x')
    count += 1;
  if (count == 2) {
    if (playground[3 * 0 + 2] == ' ')
      return 3 * 0 + 2;
    if (playground[3 * 1 + 1] == ' ')
      return 3 * 1 + 1;
    if (playground[3 * 2 + 0] == ' ')
      return 3 * 2 + 0;
  }
  return -1;
}
```