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

```asm
<main>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xd8,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0xc8(%rsp)
  xor    %eax,%eax
  movl   $0x66647361,0x9(%rsp)
  movw   $0x7369,0xd(%rsp)
  movb   $0x0,0xf(%rsp)
  movabs $0x747464646f646f64,%rax
  mov    %rax,0x7a(%rsp)
  movw   $0x6572,0x82(%rsp)
  movb   $0x0,0x84(%rsp)
  lea    0x9(%rsp),%rbx
  mov    %rbx,%rsi
  lea    D164(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <mystrlen@plt>
  mov    %eax,%esi
  lea    D140(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x7a(%rsp),%rbx
  mov    %rbx,%rsi
  lea    D9(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <mystrlen@plt>
  mov    %eax,%esi
  lea    D144(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movabs $0x6b6673646a647361,%rax
  mov    %rax,0x20(%rsp)
  movb   $0x0,0x28(%rsp)
  movabs $0x73616b736b736a6b,%rax
  mov    %rax,0x85(%rsp)
  movw   $0x736b,0x8d(%rsp)
  movb   $0x0,0x8f(%rsp)
  lea    0x20(%rsp),%rbx
  mov    %rbx,%rsi
  lea    D157(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x85(%rsp),%rbp
  mov    %rbp,%rsi
  lea    D135(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <mystrcpy@plt>
  mov    %eax,%esi
  lea    D167(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movabs $0x6164737569616473,%rax
  movabs $0x6664677361736166,%rdx
  mov    %rax,0x90(%rsp)
  mov    %rdx,0x98(%rsp)
  movb   $0x0,0xa0(%rsp)
  movabs $0x6a6a676666666667,%rax
  movabs $0x646c6b6a64666c6b,%rdx
  mov    %rax,0xb0(%rsp)
  mov    %rdx,0xb8(%rsp)
  movw   $0x66,0xc0(%rsp)
  lea    0x90(%rsp),%rbx
  mov    %rbx,%rsi
  lea    D172(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0xb0(%rsp),%rbp
  mov    %rbp,%rsi
  lea    D3(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x3,%edx
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <mystrncat@plt>
  mov    %eax,%esi
  lea    D10(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movabs $0x6664736166647361,%rbx
  mov    %rbx,0x29(%rsp)
  movb   $0x0,0x31(%rsp)
  mov    %rbx,0x32(%rsp)
  movb   $0x0,0x3a(%rsp)
  lea    0x29(%rsp),%rbp
  mov    %rbp,%rsi
  lea    D76(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x32(%rsp),%r12
  mov    %r12,%rsi
  lea    D289(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r12,%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <mystrcmp@plt>
  mov    %eax,%esi
  lea    D221(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movabs $0x64736166647361,%rbp
  mov    %rbp,0x10(%rsp)
  mov    %rbx,0x3b(%rsp)
  movb   $0x0,0x43(%rsp)
  lea    0x10(%rsp),%r12
  mov    %r12,%rsi
  lea    D185(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x3b(%rsp),%r13
  mov    %r13,%rsi
  lea    D276(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r13,%rsi
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <mystrcmp@plt>
  mov    %eax,%esi
  lea    D213(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %rbx,0x44(%rsp)
  movb   $0x0,0x4c(%rsp)
  mov    %rbp,0x18(%rsp)
  lea    0x44(%rsp),%rbp
  mov    %rbp,%rsi
  lea    D259(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x18(%rsp),%r12
  mov    %r12,%rsi
  lea    D8(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r12,%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <mystrcmp@plt>
  mov    %eax,%esi
  lea    D264(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  movabs $0x6764736166647361,%rbp
  mov    %rbp,0x4d(%rsp)
  movb   $0x0,0x55(%rsp)
  mov    %rbx,0x56(%rsp)
  movb   $0x0,0x5e(%rsp)
  lea    0x4d(%rsp),%r12
  mov    %r12,%rsi
  lea    D119(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x56(%rsp),%r13
  mov    %r13,%rsi
  lea    D91(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r13,%rsi
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <mystrcmp@plt>
  mov    %eax,%esi
  lea    D260(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %rbx,0x5f(%rsp)
  movb   $0x0,0x67(%rsp)
  mov    %rbp,0x68(%rsp)
  movb   $0x0,0x70(%rsp)
  lea    0x5f(%rsp),%rbp
  mov    %rbp,%rsi
  lea    D133(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x68(%rsp),%r12
  mov    %r12,%rsi
  lea    D100(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r12,%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <mystrcmp@plt>
  mov    %eax,%esi
  lea    D176(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %rbx,0x71(%rsp)
  movb   $0x0,0x79(%rsp)
  lea    0x71(%rsp),%rbx
  mov    %rbx,%rsi
  lea    D189(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %rbx,%rsi
  lea    D34(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D63(%rip),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <mystrchr@plt>
  mov    %eax,%esi
  lea    D305(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D273(%rip),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <mystrchr@plt>
  mov    %eax,%esi
  lea    D53(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0xc8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L8
  mov    $0x0,%eax
  add    $0xd8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L8:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: tag: D164
data_type: string
name: read_data
arguments: tag: D140
data_type: string
name: read_data
arguments: tag: D9
data_type: string
name: read_data
arguments: tag: D144
data_type: string
name: read_data
arguments: tag: D157
data_type: string
name: read_data
arguments: tag: D135
data_type: string
name: read_data
arguments: tag: D167
data_type: string
name: read_data
arguments: tag: D172
data_type: string
name: read_data
arguments: tag: D3
data_type: string
name: read_data
arguments: tag: D10
data_type: string
name: read_data
arguments: tag: D76
data_type: string
name: read_data
arguments: tag: D289
data_type: string
name: read_data
arguments: tag: D221
data_type: string
name: read_data
arguments: tag: D185
data_type: string
name: read_data
arguments: tag: D276
data_type: string
name: read_data
arguments: tag: D213
data_type: string
name: read_data
arguments: tag: D259
data_type: string
name: read_data
arguments: tag: D8
data_type: string
name: read_data
arguments: tag: D264
data_type: string
name: read_data
arguments: tag: D119
data_type: string
name: read_data
arguments: tag: D91
data_type: string
name: read_data
arguments: tag: D260
data_type: string
name: read_data
arguments: tag: D133
data_type: string
name: read_data
arguments: tag: D100
data_type: string
name: read_data
arguments: tag: D176
data_type: string
name: read_data
arguments: tag: D189
data_type: string
name: read_data
arguments: tag: D34
data_type: string
name: read_data
arguments: tag: D63
data_type: string
name: read_data
arguments: tag: D305
data_type: string
name: read_data
arguments: tag: D273
data_type: string
name: read_data
arguments: tag: D53
data_type: string

tool: D164: 
String s1: %s


tool: D140: Length of s1: %d


tool: D9: String s2: %s


tool: D144: Length of s2: %d



tool: D157: String s3: %s


tool: D135: String s4: %s


tool: D167: Copied s4 onto s3: %s



tool: D172: String s5: %s


tool: D3: String s6: %s


tool: D10: Concatenated 3 of s6 onto s5: %s



tool: D76: String s7: %s


tool: D289: String s8: %s


tool: D221: String s7 vs String s8: %d



tool: D185: String s9: %s


tool: D276: String s10: %s


tool: D213: String s9 vs String s10: %d



tool: D259: String s11: %s


tool: D8: String s12: %s


tool: D264: String s11 vs String s12: %d



tool: D119: String s13: %s


tool: D91: String s14: %s


tool: D260: String s13 vs String s14: %d



tool: D133: String s15: %s


tool: D100: String s16: %s


tool: D176: String s15 vs String s16: %d



tool: D189: String s17: %s


tool: D34: Address of String s17: %lu


tool: D63: a

tool: D305: Address of "a" in s17: %lu


tool: D273: sdf

tool: D53: Address of "sdf" in s17: %lu



assistant: ```c
int main() {
  char s1[] = "asdfis";
  char s2[] = "dododdttre";
  printf("\nString s1: %s\n", s1);
  printf("Length of s1: %d\n", mystrlen(s1));
  printf("String s2: %s\n", s2);
  printf("Length of s2: %d\n\n", mystrlen(s2));
  char s3[] = "asdjdsfk";
  char s4[] = "kjskskasks";
  printf("String s3: %s\n", s3);
  printf("String s4: %s\n", s4);
  printf("Copied s4 onto s3: %s\n\n", mystrcpy(s3, s4));
  char s5[] = "sdaiusdafasasgdf";
  char s6[] = "gffffgjjklfdjkldf";
  printf("String s5: %s\n", s5);
  printf("String s6: %s\n", s6);
  printf("Concatenated 3 of s6 onto s5: %s\n\n", mystrncat(s5, s6, 3));
  char s7[] = "asdfasdf";
  char s8[] = "asdfasdf";
  printf("String s7: %s\n", s7);
  printf("String s8: %s\n", s8);
  printf("String s7 vs String s8: %d\n\n", mystrcmp(s7, s8));
  char s9[] = "asdfasd";
  char s10[] = "asdfasdf";
  printf("String s9: %s\n", s9);
  printf("String s10: %s\n", s10);
  printf("String s9 vs String s10: %d\n\n", mystrcmp(s9, s10));
  char s11[] = "asdfasdf";
  char s12[] = "asdfasd";
  printf("String s11: %s\n", s11);
  printf("String s12: %s\n", s12);
  printf("String s11 vs String s12: %d\n\n", mystrcmp(s11, s12));
  char s13[] = "asdfasdg";
  char s14[] = "asdfasdf";
  printf("String s13: %s\n", s13);
  printf("String s14: %s\n", s14);
  printf("String s13 vs String s14: %d\n\n", mystrcmp(s13, s14));
  char s15[] = "asdfasdf";
  char s16[] = "asdfasdg";
  printf("String s15: %s\n", s15);
  printf("String s16: %s\n", s16);
  printf("String s15 vs String s16: %d\n\n", mystrcmp(s15, s16));
  char s17[] = "asdfasdf";
  printf("String s17: %s\n", s17);
  printf("Address of String s17: %lu\n", &s17);
  printf("Address of \"a\" in s17: %lu\n", mystrchr(s17, "a"));
  printf("Address of \"sdf\" in s17: %lu\n\n", mystrchr(s17, "sdf"));
}
```