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

```asm
<readFile>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%r12
  mov    %rsi,%r15
  mov    %rdx,0x8(%rsp)
  mov    %rcx,0x10(%rsp)
  mov    %r8,0x18(%rsp)
  mov    $0x3,%r14d
L109:
  mov    %r12,%rdi
  call   <fgetc@plt>
  mov    %eax,%ebx
  mov    D28(%rip),%rax
  cmp    %bl,(%rax)
  je     L73
  mov    %r12,%rdi
  call   <fgetc@plt>
  mov    %eax,%ebp
  mov    D28(%rip),%rax
  cmp    %bpl,(%rax)
  je     L109
  mov    %r12,%rdi
  call   <fgetc@plt>
  mov    %eax,%r13d
  mov    D28(%rip),%rax
  cmp    %r13b,(%rax)
  je     L109
  cmp    $0x2,%r14d
  je     L34
  jg     L66
  test   %r14d,%r14d
  je     L87
  cmp    $0x1,%r14d
  jne    L109
  movsbl %bl,%edi
  mov    %r15,%rsi
  call   <fputc@plt>
  xor    %ebp,%ebx
  xor    %r13d,%ebx
  movsbl %bl,%edi
  mov    0x8(%rsp),%rsi
  call   <fputc@plt>
  movsbl %bpl,%edi
  mov    0x10(%rsp),%rsi
  call   <fputc@plt>
  movsbl %r13b,%edi
  mov    0x18(%rsp),%rsi
  call   <fputc@plt>
  mov    $0x0,%r14d
  jmp    L109
L66:
  cmp    $0x3,%r14d
  jne    L109
  movsbl %bl,%edi
  mov    %r15,%rsi
  call   <fputc@plt>
  movsbl %bpl,%edi
  mov    0x8(%rsp),%rsi
  call   <fputc@plt>
  movsbl %r13b,%edi
  mov    0x10(%rsp),%rsi
  call   <fputc@plt>
  xor    %ebx,%ebp
  xor    %r13d,%ebp
  movsbl %bpl,%edi
  mov    0x18(%rsp),%rsi
  call   <fputc@plt>
  mov    $0x2,%r14d
  jmp    L109
L87:
  mov    %ebx,%edi
  xor    %ebp,%edi
  xor    %r13d,%edi
  movsbl %dil,%edi
  mov    %r15,%rsi
  call   <fputc@plt>
  movsbl %bl,%edi
  mov    0x8(%rsp),%rsi
  call   <fputc@plt>
  movsbl %bpl,%edi
  mov    0x10(%rsp),%rsi
  call   <fputc@plt>
  movsbl %r13b,%edi
  mov    0x18(%rsp),%rsi
  call   <fputc@plt>
  mov    $0x3,%r14d
  jmp    L109
L34:
  movsbl %bl,%edi
  mov    %r15,%rsi
  call   <fputc@plt>
  movsbl %bpl,%edi
  mov    0x8(%rsp),%rsi
  call   <fputc@plt>
  xor    %ebp,%ebx
  xor    %r13d,%ebx
  movsbl %bl,%edi
  mov    0x10(%rsp),%rsi
  call   <fputc@plt>
  movsbl %r13b,%edi
  mov    0x18(%rsp),%rsi
  call   <fputc@plt>
  mov    $0x1,%r14d
  jmp    L109
L73:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void readFile(FILE *f, FILE *out1, FILE *out2, FILE *out3, FILE *out4) {
  char get, save[2];
  int i = 3;
  while ((get = fgetc(f)) != EOF) {
    save[0] = get;
    if ((get = fgetc(f)) != EOF) {
      save[1] = get;
      if ((get = fgetc(f)) != EOF) {
        switch (i) {
        case 0:
          fputc((save[0] ^ save[1] ^ get), out1);
          fputc(save[0], out2);
          fputc(save[1], out3);
          fputc(get, out4);
          i = 3;
          break;
        case 1:
          fputc(save[0], out1);
          fputc((save[0] ^ save[1] ^ get), out2);
          fputc(save[1], out3);
          fputc(get, out4);
          i--;
          break;
        case 2:
          fputc(save[0], out1);
          fputc(save[1], out2);
          fputc((save[0] ^ save[1] ^ get), out3);
          fputc(get, out4);
          i--;
          break;
        case 3:
          fputc(save[0], out1);
          fputc(save[1], out2);
          fputc(get, out3);
          fputc((save[0] ^ save[1] ^ get), out4);
          i--;
        }
      }
    }
  }
}
```