#include<bits/stdc++.h> using namespace std; int main(){ string s1,s2; cin>>s1>>s2; int len=s1.size(); for(int i=0;i<len;i++){ if(s1[i]>='a'&&s1[i]<='z'){ cout<<s2[s1[i]-'a']; } else{ cout<<char(s2[s1[i]-'a']-32); } } return 0; }