#coding=utf-8
import urllib
import urllib2
import base64
import cookielib
import Cookie
for num in range(1,50):
    reg_url='http://127.0.0.1/ecb.php?a=reg'
    index_url='http://127.0.0.1/ecb.php'
    cookie=cookielib.CookieJar()
    opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cookie))
    opener.addheaders.append(('User-Agent','Mozilla/5.0'))
    num=str(num)
    values={'username':'aaaaaaaaaaaaaaaa'+num,'password':'123'}
    data=urllib.urlencode(values)
    opener.open(reg_url,data)
    text=opener.open(index_url,data)
    for ck in cookie:
        if ck.name=='username':
            user_name=ck.value
    user_name = urllib.unquote(user_name)
    user_name = base64.b64decode(user_name)
    hex_name = user_name.encode('hex')
    hex_name = hex_name[len(hex_name)/2:]
    hex_name = hex_name.decode('hex')
    uid = base64.b64encode(hex_name)
    uid = urllib.quote(uid)
    for ck in cookie:
        if ck.name=='uid':
            ck.value=uid
    text=opener.open(index_url).read()
    if 'Flag' in text:
        print text
        break
    else:
       print num