import sys
s = input().strip()
t = input().strip()

# 去重
l = sorted(set(list(s)),key = s.index)

# 按字母表顺序增加
alphabet = 'abcdefghijklmnopqrstuvwxyz'
for i in alphabet:
    if i not in l:l.append(i)

# 构建新字符串
t1=''
for n in range(len(t)):
    t1 += l[alphabet.find(t[n])]
print(t1)