user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  sub    $0x18,%rsp
  lea    D203(%rip),%rdi
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x7(%rsp),%rsi
  call   <scanf@plt>
  movzbl 0x7(%rsp),%eax
  cmp    $0x61,%al
  je     L98
L345:
  cmp    $0x62,%al
  je     L142
L432:
  cmp    $0x63,%al
  je     L207
L160:
  cmp    $0x64,%al
  je     L223
L376:
  cmp    $0x65,%al
  je     L239
L141:
  cmp    $0x66,%al
  je     L201
L233:
  cmp    $0x67,%al
  je     L211
L296:
  cmp    $0x68,%al
  je     L493
L127:
  cmp    $0x69,%al
  je     L382
L268:
  cmp    $0x6a,%al
  je     L68
L182:
  cmp    $0x6b,%al
  je     L498
L318:
  cmp    $0x6c,%al
  je     L181
L3:
  cmp    $0x6d,%al
  je     L371
L13:
  cmp    $0x6e,%al
  je     L115
L315:
  cmp    $0x6f,%al
  je     L222
L49:
  cmp    $0x70,%al
  je     L252
L497:
  cmp    $0x71,%al
  je     L2
L356:
  cmp    $0x72,%al
  je     L112
L286:
  cmp    $0x73,%al
  je     L249
L70:
  cmp    $0x74,%al
  je     L336
L107:
  cmp    $0x75,%al
  je     L319
L45:
  cmp    $0x76,%al
  je     L79
L321:
  cmp    $0x77,%al
  je     L23
L510:
  cmp    $0x78,%al
  je     L167
L87:
  cmp    $0x79,%al
  je     L293
L517:
  cmp    $0x7a,%al
  je     L424
L473:
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L209
  xor    %eax,%eax
  add    $0x18,%rsp
  ret
L98:
  lea    D52(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L345
L424:
  lea    D46(%rip),%rdi
  call   <printf@plt>
  jmp    L473
L293:
  lea    D236(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L517
L167:
  lea    D263(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L87
L23:
  lea    D224(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L510
L79:
  lea    D211(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L321
L319:
  lea    D12(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L45
L336:
  lea    D225(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L107
L249:
  lea    D26(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L70
L112:
  lea    D16(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L286
L2:
  lea    D89(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L356
L252:
  lea    D209(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L497
L222:
  lea    D100(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L49
L115:
  lea    D25(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L315
L371:
  lea    D27(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L13
L181:
  lea    D212(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L3
L498:
  lea    D79(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L318
L68:
  lea    D133(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L182
L382:
  lea    D252(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L268
L493:
  lea    D47(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L127
L211:
  lea    D30(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L296
L201:
  lea    D74(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L233
L239:
  lea    D245(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L141
L223:
  lea    D256(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L376
L207:
  lea    D235(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L160
L142:
  lea    D49(%rip),%rdi
  call   <printf@plt>
  movzbl 0x7(%rsp),%eax
  jmp    L432
L209:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_tag: D203
data_type: string
name: unpack_data
arguments: data_tag: D52
data_type: string
name: unpack_data
arguments: data_tag: D46
data_type: string
name: unpack_data
arguments: data_tag: D236
data_type: string
name: unpack_data
arguments: data_tag: D263
data_type: string
name: unpack_data
arguments: data_tag: D224
data_type: string
name: unpack_data
arguments: data_tag: D211
data_type: string
name: unpack_data
arguments: data_tag: D12
data_type: string
name: unpack_data
arguments: data_tag: D225
data_type: string
name: unpack_data
arguments: data_tag: D26
data_type: string
name: unpack_data
arguments: data_tag: D16
data_type: string
name: unpack_data
arguments: data_tag: D89
data_type: string
name: unpack_data
arguments: data_tag: D209
data_type: string
name: unpack_data
arguments: data_tag: D100
data_type: string
name: unpack_data
arguments: data_tag: D25
data_type: string
name: unpack_data
arguments: data_tag: D27
data_type: string
name: unpack_data
arguments: data_tag: D212
data_type: string
name: unpack_data
arguments: data_tag: D79
data_type: string
name: unpack_data
arguments: data_tag: D133
data_type: string
name: unpack_data
arguments: data_tag: D252
data_type: string
name: unpack_data
arguments: data_tag: D47
data_type: string
name: unpack_data
arguments: data_tag: D30
data_type: string
name: unpack_data
arguments: data_tag: D74
data_type: string
name: unpack_data
arguments: data_tag: D245
data_type: string
name: unpack_data
arguments: data_tag: D256
data_type: string
name: unpack_data
arguments: data_tag: D235
data_type: string
name: unpack_data
arguments: data_tag: D49
data_type: string

tool: D203: %s

tool: D52: z


tool: D46: a


tool: D236: b


tool: D263: c


tool: D224: d


tool: D211: e


tool: D12: f


tool: D225: g


tool: D26: h


tool: D16: i


tool: D89: j


tool: D209: k


tool: D100: l


tool: D25: m


tool: D27: n


tool: D212: o


tool: D79: p


tool: D133: q


tool: D252: r


tool: D47: s


tool: D30: t


tool: D74: u


tool: D245: v


tool: D256: w


tool: D235: x


tool: D49: y


assistant: ```c
int main() {
  char g;
  scanf("%s", &g);
  if (g == 97)
    printf("z\n");
  if (g == 98)
    printf("y\n");
  if (g == 99)
    printf("x\n");
  if (g == 100)
    printf("w\n");
  if (g == 101)
    printf("v\n");
  if (g == 102)
    printf("u\n");
  if (g == 103)
    printf("t\n");
  if (g == 104)
    printf("s\n");
  if (g == 105)
    printf("r\n");
  if (g == 106)
    printf("q\n");
  if (g == 107)
    printf("p\n");
  if (g == 108)
    printf("o\n");
  if (g == 109)
    printf("n\n");
  if (g == 110)
    printf("m\n");
  if (g == 111)
    printf("l\n");
  if (g == 112)
    printf("k\n");
  if (g == 113)
    printf("j\n");
  if (g == 114)
    printf("i\n");
  if (g == 115)
    printf("h\n");
  if (g == 116)
    printf("g\n");
  if (g == 117)
    printf("f\n");
  if (g == 118)
    printf("e\n");
  if (g == 119)
    printf("d\n");
  if (g == 120)
    printf("c\n");
  if (g == 121)
    printf("b\n");
  if (g == 122)
    printf("a\n");
  return 0;
}
```