key = input().lower()
mingwen = input().lower()

alpha = 'abcdefghijklmnopqrstuvwxyz'
mimabiao = []
miwen = ''

for i in key:
    if i not in mimabiao:
        mimabiao.append(i)
for j in alpha:
    if j not in mimabiao:
        mimabiao.append(j)

for k in mingwen:
    if not k.isalpha():
        miwen += k
    else:
        miwen += mimabiao[alpha.index(k)]

print(miwen)