import sys

key = input()
password=input()
wordstr="A B C D E F G H I J K L M N O P Q R S T U V W X Y Z"
wordlist=wordstr.split(" ")
wordlist=[chr(ord(it)-ord('A')+ord('a')) for it in wordlist]
new_wordlist=[]
for it in key:
    if it not in new_wordlist:
        new_wordlist.append(it)
for it in wordlist:
    if it not in new_wordlist:
        new_wordlist.append(it)
result=[]
for it in password:
        result.append(new_wordlist[ord(it)-ord('a')])
print(''.join(result))