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

```asm
<main>:
  endbr64
  push   %rbp
  lea    D70(%rip),%rbp
  mov    %rbp,%rdi
  call   <is_palindrome_iter@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  lea    D60(%rip),%rbp
  call   <is_palindrome_rec@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <is_palindrome_iter@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  lea    D64(%rip),%rbp
  call   <is_palindrome_rec@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <is_palindrome_iter@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  lea    D37(%rip),%rbp
  call   <is_palindrome_rec@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <is_palindrome_iter@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  lea    D23(%rip),%rbp
  call   <is_palindrome_rec@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <is_palindrome_iter@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  lea    D45(%rip),%rbp
  call   <is_palindrome_rec@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <is_palindrome_iter@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  lea    D58(%rip),%rbp
  call   <is_palindrome_rec@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <is_palindrome_iter@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <is_palindrome_rec@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  lea    D67(%rip),%rdi
  call   <printf@plt>
  xor    %eax,%eax
  pop    %rbp
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D70
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D60
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D64
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D37
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D23
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D45
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D58
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D67
type_infered: string

tool: D70: regninger

tool: D60: regning

tool: 

tool: D37: i

tool: D23: aa

tool: D45: er

tool: D58: regnimger

tool: D67: All test passed


assistant: ```c
int main(void) {
  char *ord[] = {"regninger", "regning", "", "i", "aa", "er", "regnimger"};
  assert(1 == is_palindrome_iter(ord[0]));
  assert(1 == is_palindrome_rec(ord[0]));
  assert(0 == is_palindrome_iter(ord[1]));
  assert(0 == is_palindrome_rec(ord[1]));
  assert(1 == is_palindrome_iter(ord[2]));
  assert(1 == is_palindrome_rec(ord[2]));
  assert(1 == is_palindrome_iter(ord[3]));
  assert(1 == is_palindrome_rec(ord[3]));
  assert(1 == is_palindrome_iter(ord[4]));
  assert(1 == is_palindrome_rec(ord[4]));
  assert(0 == is_palindrome_iter(ord[5]));
  assert(0 == is_palindrome_rec(ord[5]));
  assert(0 == is_palindrome_iter(ord[6]));
  assert(0 == is_palindrome_rec(ord[6]));
  printf("All test passed\n");
  return 0;
}
```