#!/usr/bin/python
import string
import random
username = ''.join([random.choice(string.ascii_letters) for n in xrange(254)])
print "Username : " + username
count = 0
key = ""
shifted_letter = 0
while (count < len(username)):
    if count != 0:
        current_letter = username[count-1]
        next_letter = username[count]
        add_letter = ord(current_letter) + ord(next_letter)
        shift_letter = add_letter >> 1
        key += chr(shift_letter)
    else:
        key += username[count]
    count = count + 1
print ""
print "Key : " + key