include<bits/stdc++.h>

using namespace std; int main(){

string change ;
getline(cin , change);
string code;
getline(cin , code);
string res = "";
for(int i = 0; i < code.length(); i++){
	if(code[i] >= 'A' && code[i] <= 'Z'){
		int changenum = code[i] - 'A'; // A - A = 0
		res = res + change[changenum]; // 简单映射
	}
	else res = res + code[i];
}
cout << res;

}