user: What is the c source code of the assembly code below:

```asm
<permutation>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %esi,0x20(%rsp)
  test   %esi,%esi
  js     L70
  mov    %edx,%r12d
  cmp    %edx,%esi
  jg     L70
  je     L205
  lea    0x1(%rsi),%ecx
  mov    %esi,0x3c(%rsp)
  lea    0x8(%rsi),%r15d
  mov    %ecx,0x38(%rsp)
  lea    0x2(%rsi),%ecx
  mov    %r15d,%r13d
  mov    %rdi,%r15
  mov    %ecx,0x2c(%rsp)
  lea    0x3(%rsi),%ecx
  mov    %ecx,0x24(%rsp)
  lea    0x4(%rsi),%ecx
  mov    %ecx,0x18(%rsp)
  lea    0x5(%rsi),%ecx
  mov    %ecx,0x10(%rsp)
  lea    0x6(%rsi),%ecx
  mov    %ecx,0x8(%rsp)
  lea    0x7(%rsi),%ecx
  mov    %ecx,0x4(%rsp)
L93:
  mov    0x3c(%rsp),%edx
  mov    0x20(%rsp),%esi
  mov    %r15,%rdi
  call   <swap@plt>
  mov    0x38(%rsp),%eax
  cmp    %r12d,%eax
  jg     L343
  mov    %eax,0x34(%rsp)
  je     L169
L310:
  mov    0x34(%rsp),%edx
  mov    0x38(%rsp),%esi
  mov    %r15,%rdi
  call   <swap@plt>
  mov    0x2c(%rsp),%eax
  cmp    %eax,%r12d
  jl     L271
  mov    %eax,0x28(%rsp)
  mov    %r13d,%r14d
  je     L273
L164:
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%esi
  mov    %r15,%rdi
  call   <swap@plt>
  mov    0x24(%rsp),%eax
  cmp    %eax,%r12d
  jl     L147
  mov    %eax,0x1c(%rsp)
  mov    %r14d,%r13d
  je     L121
L166:
  mov    0x1c(%rsp),%edx
  mov    0x24(%rsp),%esi
  mov    %r15,%rdi
  call   <swap@plt>
  mov    0x18(%rsp),%eax
  cmp    %eax,%r12d
  jl     L79
  mov    %eax,0x14(%rsp)
  je     L186
L253:
  mov    0x14(%rsp),%edx
  mov    0x18(%rsp),%esi
  mov    %r15,%rdi
  call   <swap@plt>
  mov    0x10(%rsp),%eax
  cmp    %eax,%r12d
  jl     L170
  mov    %eax,0xc(%rsp)
  je     L302
L157:
  mov    0xc(%rsp),%edx
  mov    0x10(%rsp),%esi
  mov    %r15,%rdi
  call   <swap@plt>
  mov    0x8(%rsp),%eax
  cmp    %eax,%r12d
  jl     L21
  mov    %eax,%ebp
  je     L257
L154:
  mov    0x8(%rsp),%esi
  mov    %ebp,%edx
  mov    %r15,%rdi
  call   <swap@plt>
  mov    0x4(%rsp),%eax
  cmp    %eax,%r12d
  jl     L46
  mov    %eax,%ebx
  je     L57
  mov    %ebp,0x30(%rsp)
L109:
  mov    0x4(%rsp),%esi
  mov    %ebx,%edx
  mov    %r15,%rdi
  call   <swap@plt>
  cmp    %r13d,%r12d
  jl     L24
  mov    0x20(%rsp),%eax
  mov    %r13d,%ebp
  lea    0x9(%rax),%r14d
  je     L43
L245:
  mov    %ebp,%edx
  mov    %r13d,%esi
  mov    %r15,%rdi
  call   <swap@plt>
  mov    %r12d,%edx
  mov    %r14d,%esi
  mov    %r15,%rdi
  call   <permutation>
  mov    %ebp,%edx
  mov    %r13d,%esi
  mov    %r15,%rdi
  call   <swap@plt>
  add    $0x1,%ebp
  cmp    %ebp,%r12d
  jge    L245
L24:
  mov    0x4(%rsp),%esi
  mov    %ebx,%edx
  mov    %r15,%rdi
  add    $0x1,%ebx
  call   <swap@plt>
  cmp    %ebx,%r12d
  jge    L109
  mov    0x30(%rsp),%ebp
L46:
  mov    0x8(%rsp),%esi
  mov    %ebp,%edx
  mov    %r15,%rdi
  add    $0x1,%ebp
  call   <swap@plt>
  cmp    %ebp,%r12d
  jge    L154
L21:
  mov    0xc(%rsp),%ebx
  mov    0x10(%rsp),%esi
  mov    %r15,%rdi
  mov    %ebx,%edx
  call   <swap@plt>
  mov    %ebx,%eax
  add    $0x1,%eax
  mov    %eax,0xc(%rsp)
  cmp    %eax,%r12d
  jge    L157
L170:
  mov    0x14(%rsp),%ebx
  mov    0x18(%rsp),%esi
  mov    %r15,%rdi
  mov    %ebx,%edx
  call   <swap@plt>
  mov    %ebx,%eax
  add    $0x1,%eax
  mov    %eax,0x14(%rsp)
  cmp    %eax,%r12d
  jge    L253
L79:
  mov    0x1c(%rsp),%ebx
  mov    0x24(%rsp),%esi
  mov    %r15,%rdi
  mov    %ebx,%edx
  call   <swap@plt>
  mov    %ebx,%eax
  add    $0x1,%eax
  mov    %eax,0x1c(%rsp)
  cmp    %eax,%r12d
  jge    L166
  mov    %r13d,%r14d
L147:
  mov    0x28(%rsp),%ebx
  mov    0x2c(%rsp),%esi
  mov    %r15,%rdi
  mov    %ebx,%edx
  call   <swap@plt>
  mov    %ebx,%eax
  add    $0x1,%eax
  mov    %eax,0x28(%rsp)
  cmp    %eax,%r12d
  jge    L164
  mov    %r14d,%r13d
L271:
  mov    0x34(%rsp),%ebx
  mov    0x38(%rsp),%esi
  mov    %r15,%rdi
  mov    %ebx,%edx
  call   <swap@plt>
  mov    %ebx,%eax
  add    $0x1,%eax
  mov    %eax,0x34(%rsp)
  cmp    %eax,%r12d
  jge    L310
L343:
  mov    0x3c(%rsp),%ebx
  mov    0x20(%rsp),%esi
  mov    %r15,%rdi
  mov    %ebx,%edx
  call   <swap@plt>
  mov    %ebx,%eax
  add    $0x1,%eax
  mov    %eax,0x3c(%rsp)
  cmp    %eax,%r12d
  jge    L93
L70:
  add    $0x48,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L43:
  mov    %r15,%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  jmp    L24
  nopl   0x0(%rax)
L57:
  mov    %r15,%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  jmp    L46
  nopl   0x0(%rax)
L257:
  mov    %r15,%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  jmp    L21
  nopl   0x0(%rax)
L302:
  mov    %r15,%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  jmp    L170
  nopl   0x0(%rax)
L186:
  mov    %r15,%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  jmp    L79
L121:
  mov    %r15,%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  jmp    L147
L273:
  mov    %r15,%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  jmp    L271
L205:
  add    $0x48,%rsp
  mov    %rdi,%rsi
  lea    D32(%rip),%rdi
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1060 <printf@plt>
L169:
  mov    %r15,%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  jmp    L343
```

tool_calls: name: unpack_data
arguments: data_label: D32
type_guessed: string

tool: D32: %s


assistant: ```c
void permutation(char str[], int begin, int end) {
  if (0 <= begin && begin <= end) {
    if (begin == end)
      printf("%s\n", str);
    else {
      int i;
      for (i = begin; i <= end; i++) {
        swap(str, begin, i);
        permutation(str, begin + 1, end);
        swap(str, begin, i);
      }
    }
  }
}
```