#!/usr/bin/python

from sys import argv, stdin

# This will be different for everyone!
key = argv[1]

fulltext = stdin.read().lower()

key_count = 0
ciphertext = ""
for letter in fulltext:
	letter_number = ord(letter) - ord('a') + 1
	if letter_number < 1 or letter_number > 26:
		continue

	# New section for Vigenere, calculate shift
	shift = ord(key[key_count]) - ord('a') + 1
	key_count += 1
	if key_count >= len(key):
		key_count = 0

	new_letter_number = letter_number + shift
	if new_letter_number > 26:
		new_letter_number -= 26
	ciphertext += chr(new_letter_number + ord('a') - 1)

print ciphertext.upper()