# 密钥 ：TRAILBLAZERS
#顶 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
#取 T R A I L B Z E S C D F G H J K M N O P Q U V W X Y
# Attack AT DAWN (黎明时攻击)
# Tpptad TP ITVH
key = input()
mimabiao = []
mingwen = input()
zimubiao = 'abcdefghijklmnopqrstuvwxyz'
res = []
# 去重
for i in key:
    if i not in mimabiao:
        mimabiao.append(i)
#print(ls)
for j in zimubiao:
    if j not in mimabiao:
        mimabiao.append(j)

for k in mingwen:
    if not k.isalpha():
        res.append(k)   
    else:
        res.append(mimabiao[zimubiao.index(k)])
        
print(''.join(res))