from pwn import *

sh = remote('challenges.metactfjo.com', 666)

#Header lines
print sh.recvline()
print sh.recvline()
print sh.recvline()
#End header lines

import base64
def get_answer():
    r = sh.recvline()
    print r
    r = ' '.join(r.split(' ')[3:]).strip()

    isbinary=True
    for c in r:
        if c not in '01':
            isbinary=False
            break
    isdecimal=True
    for c in r:
        if c not in '1234567890 ':
            isdecimal=False
    ishexa=True
    for c in r:
        if c not in '1234567890abcdef':
            ishexa=False

    rez = ''
    if isbinary==True:
        rez = ('%x'%int(r,2)).decode('hex')
    elif isdecimal==True:
        for c in r.split(' '):
            if c=='':
                continue
            rez += chr(int(c))
    elif ishexa==True:
        rez = r.decode('hex')
    else:
        rez = base64.b64decode(r)

    return rez

for i in range(49):
    sh.sendline(get_answer())
    sh.recvline()
sh.sendline(get_answer())
sh.interactive()