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