![GDB](./gdb_0.png)
# challenge.py
```pyimport gdb
class HelloPy(gdb.Command):    def __init__(self):        super(HelloPy, self).__init__('hello_py', gdb.COMMAND_USER)
    def invoke(self, _unicode_args, _from_tty):
        alf = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_+?{}'
        # 0x555555555914 break
        w = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'        a = 0
        while a < 58:            x = 0            while True:                ww = list(w)                ww[a] = alf[x]                gdb.execute(f"r <<< {''.join(ww)}")                for i in range(a):                    gdb.execute('c')
                if int(gdb.parse_and_eval("$rbx")) == int(gdb.parse_and_eval("$rax")):                    w = ''.join(ww)                    print(w)                    a += 1                    break                x += 1
HelloPy()```
![GDB](./gdb_1.png)
# FLAG
**`vsctf{1_b37_y0u_w1LL_n3v3r_u53_Func710n4L_C++_1n_ur_L1F3?}`**
