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