big = [chr(i) for i in range(65,91)]#所有大写字母
small = [chr(i) for i in range(97,123)]#所有小写字母
while True:
try:
key = input()
str = input()
except:
break
else:
password_dict = {}
password_list = []
key = key.upper()
for i in key:
if i not in password_list:
password_list.append(i)
for i in big:
if i not in password_list:
password_list.append(i)
password_list_small = [x.lower() for x in password_list]
for i in range(26):
password_dict[big[i]] = password_list[i]
password_dict[small[i]] = password_list_small[i]
for i in str:
print(password_dict[i],end='')
print()