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

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %rbx
  sub    $0x190,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x188(%rsp)
  xor    %eax,%eax
  lea    D22(%rip),%rdi
  call   <puts@plt>
  lea    D70(%rip),%rbx
  mov    %rbx,%rdi
  call   <len@plt>
  mov    %eax,%edx
  mov    %rbx,%rsi
  lea    D7(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %rbx,%rdi
  call   <len@plt>
  cmp    $0x6,%eax
  je     L5
L10:
  movabs $0x4e20202020202020,%rax
  movabs $0x2020202021435241,%rdx
  mov    %rax,(%rsp)
  mov    %rdx,0x8(%rsp)
  movq   $0x2020,0x10(%rsp)
  movq   $0x0,0x18(%rsp)
  movq   $0x0,0x20(%rsp)
  movq   $0x0,0x28(%rsp)
  movq   $0x0,0x30(%rsp)
  movl   $0x0,0x38(%rsp)
  mov    %rsp,%rdi
  call   <strip@plt>
  mov    %rax,%rsi
  lea    D61(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movabs $0x21594646555453,%rax
  mov    $0x0,%edx
  mov    %rax,0x40(%rsp)
  mov    %rdx,0x48(%rsp)
  movq   $0x0,0x50(%rsp)
  movq   $0x0,0x58(%rsp)
  movq   $0x0,0x60(%rsp)
  movq   $0x0,0x68(%rsp)
  movq   $0x0,0x70(%rsp)
  movl   $0x0,0x78(%rsp)
  lea    0x40(%rsp),%rdi
  mov    $0x0,%ecx
  mov    $0x4,%edx
  mov    $0x1,%esi
  call   <slice@plt>
  mov    %rax,%rsi
  lea    D84(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movabs $0x454854204d412049,%r14
  movabs $0x2e7375726c617720,%r15
  mov    %r14,0x80(%rsp)
  mov    %r15,0x88(%rsp)
  movq   $0x0,0x90(%rsp)
  movq   $0x0,0x98(%rsp)
  movq   $0x0,0xa0(%rsp)
  movq   $0x0,0xa8(%rsp)
  movq   $0x0,0xb0(%rsp)
  movl   $0x0,0xb8(%rsp)
  lea    0x80(%rsp),%rdi
  call   <makeCopy@plt>
  mov    %rax,%rsi
  lea    D68(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r14,0xc0(%rsp)
  mov    %r15,0xc8(%rsp)
  movq   $0x0,0xd0(%rsp)
  movq   $0x0,0xd8(%rsp)
  movq   $0x0,0xe0(%rsp)
  movq   $0x0,0xe8(%rsp)
  movq   $0x0,0xf0(%rsp)
  movl   $0x0,0xf8(%rsp)
  lea    0xc0(%rsp),%rdi
  call   <toUpperCase@plt>
  mov    %rax,%rsi
  lea    D91(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r14,0x100(%rsp)
  mov    %r15,0x108(%rsp)
  movq   $0x0,0x110(%rsp)
  movq   $0x0,0x118(%rsp)
  movq   $0x0,0x120(%rsp)
  movq   $0x0,0x128(%rsp)
  movq   $0x0,0x130(%rsp)
  movl   $0x0,0x138(%rsp)
  lea    0x100(%rsp),%rdi
  call   <toLowerCase@plt>
  mov    %rax,%rsi
  lea    D45(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movabs $0x6c6c654820656854,%rax
  movabs $0x20646c726f57206f,%rdx
  mov    %rax,0x140(%rsp)
  mov    %rdx,0x148(%rsp)
  movabs $0x2165646f43,%rax
  mov    $0x0,%edx
  mov    %rax,0x150(%rsp)
  mov    %rdx,0x158(%rsp)
  movq   $0x0,0x160(%rsp)
  movq   $0x0,0x168(%rsp)
  movq   $0x0,0x170(%rsp)
  movl   $0x0,0x178(%rsp)
  lea    0x140(%rsp),%rdi
  lea    D43(%rip),%rcx
  mov    $0x8,%edx
  mov    $0x5,%esi
  call   <replaceBetween@plt>
  mov    %rax,%rsi
  lea    D9(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x188(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L2
  mov    $0x0,%eax
  add    $0x190,%rsp
  pop    %rbx
  pop    %r14
  pop    %r15
  ret
L5:
  lea    D46(%rip),%rdi
  call   <puts@plt>
  jmp    L10
L2:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D22
type: string
name: extract_symbolic_data
arguments: data_label: D70
type: string
name: extract_symbolic_data
arguments: data_label: D7
type: string
name: extract_symbolic_data
arguments: data_label: D61
type: string
name: extract_symbolic_data
arguments: data_label: D84
type: string
name: extract_symbolic_data
arguments: data_label: D68
type: string
name: extract_symbolic_data
arguments: data_label: D91
type: string
name: extract_symbolic_data
arguments: data_label: D45
type: string
name: extract_symbolic_data
arguments: data_label: D43
type: string
name: extract_symbolic_data
arguments: data_label: D9
type: string
name: extract_symbolic_data
arguments: data_label: D46
type: string

tool: D22: Unit testing has begun

tool: D70: BUNZ! 

tool: D7: The string "%s" is %d characters long.


tool: D61: The stripped string: "%s"


tool: D84: The sliced string: "%s"


tool: D68: A copy of the string: "%s"


tool: D91: A uppercase version of the string: "%s"


tool: D45: A lowercase version of the string: "%s"


tool: D43: jjj

tool: D9: replaceBetween() test: "%s"


tool: D46: TEST PASSED.

assistant: ```c
int main(void) {
  printf("Unit testing has begun\n");
  char *testy = "BUNZ! ";
  printf("The string \"%s\" is %d characters long.\n", testy, len(testy));
  if (len(testy) == 6)
    printf("TEST PASSED.\n");
  char buffer2[60] = "       NARC!      ";
  char *testy2 = buffer2;
  printf("The stripped string: \"%s\"\n", strip(testy2));
  char buffer3[60] = "STUFFY!";
  char *testy3 = buffer3;
  printf("The sliced string: \"%s\"\n", slice(testy3, 1, 4, 0));
  char buffer4[60] = "I AM THE walrus.";
  char *testy4 = buffer4;
  printf("A copy of the string: \"%s\"\n", makeCopy(testy4));
  char buffer5[60] = "I AM THE walrus.";
  char *testy5 = buffer5;
  printf("A uppercase version of the string: \"%s\"\n", toUpperCase(testy5));
  char buffer6[60] = "I AM THE walrus.";
  char *testy6 = buffer6;
  printf("A lowercase version of the string: \"%s\"\n", toLowerCase(testy6));
  char buffer7[60] = "The Hello World Code!";
  char *testy7 = replaceBetween(buffer7, 5, 8, "jjj");
  printf("replaceBetween() test: \"%s\"\n", testy7);
  return 0;
}
```