user: Please show me the C implementation that matches the assembly code listed below:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  cmp    $0x2,%edi
  jne    L14
  mov    0x8(%rsi),%rcx
  mov    %rsi,%rbp
  xor    %ebx,%ebx
  lea    D3(%rip),%r14
  lea    D84(%rip),%r12
  lea    D17(%rip),%r15
  movsbl (%rcx),%edx
  lea    D47(%rip),%r13
  test   %dl,%dl
  je     L17
  nopw   0x0(%rax,%rax,1)
L101:
  lea    -0x41(%rdx),%eax
  mov    %ebx,%esi
  cmp    $0x38,%al
  ja     L62
  movzbl %al,%eax
  movslq (%r12,%rax,4),%rax
  add    %r12,%rax
  notrack jmp *%rax
  cs nopw 0x0(%rax,%rax,1)
L62:
  mov    %r14,%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rbp),%rcx
  xchg   %ax,%ax
L106:
  add    $0x1,%rbx
  movsbl (%rcx,%rbx,1),%edx
  test   %dl,%dl
  jne    L101
L17:
  xor    %eax,%eax
L43:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
  cmp    $0x2,%rbx
  jbe    L106
  mov    %r15,%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rbp),%rcx
  jmp    L106
  cs nopw 0x0(%rax,%rax,1)
  mov    %r13,%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rbp),%rcx
  jmp    L106
  lea    D51(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rbp),%rcx
  jmp    L106
  nopl   0x0(%rax)
  lea    D74(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rbp),%rcx
  jmp    L106
  nopl   0x0(%rax)
  lea    D56(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rbp),%rcx
  jmp    L106
  nopw   0x0(%rax,%rax,1)
  lea    D41(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    0x8(%rbp),%rcx
  jmp    L106
L14:
  lea    D15(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%eax
  jmp    L43
```

tool_calls: name: disassemble_data
arguments: tag: D3
datatype: string
name: disassemble_data
arguments: tag: D17
datatype: string
name: disassemble_data
arguments: tag: D47
datatype: string
name: disassemble_data
arguments: tag: D51
datatype: string
name: disassemble_data
arguments: tag: D74
datatype: string
name: disassemble_data
arguments: tag: D56
datatype: string
name: disassemble_data
arguments: tag: D41
datatype: string
name: disassemble_data
arguments: tag: D15
datatype: string

tool: D3: %d: %c is not a vowel


tool: D17: %d: 'Y'


tool: D47: %d: 'U'


tool: D51: %d: 'O'


tool: D74: %d: 'I'


tool: D56: %d: 'E'


tool: D41: %d: 'A'


tool: D15: ERROR: you need one argument.

assistant: ```c
int main(int argc, char *argv[]) {
  if (argc != 2) {
    printf("ERROR: you need one argument.\n");
    return 1;
  }
  int i = 0;
  for (i = 0; argv[1][i] != '\0'; i++) {
    char letter = argv[1][i];
    switch (letter) {
    case 'a':
    case 'A':
      printf("%d: 'A'\n", i);
      break;
    case 'e':
    case 'E':
      printf("%d: 'E'\n", i);
      break;
    case 'i':
    case 'I':
      printf("%d: 'I'\n", i);
      break;
    case 'o':
    case 'O':
      printf("%d: 'O'\n", i);
      break;
    case 'u':
    case 'U':
      printf("%d: 'U'\n", i);
      break;
    case 'y':
    case 'Y':
      if (i > 2) {
        printf("%d: 'Y'\n", i);
      }
      break;
    default:
      printf("%d: %c is not a vowel\n", i, letter);
    }
  }
  return 0;
}
```