#include<bits/stdc++.h> using namespace std; int main() { string a,b; cin>>a>>b; int l1=a.size(); for(int i=0;i<l1;i++){ if(a[i]>='a'&&a[i]<='z')a[i]=b[int(a[i]-'a')]; else if(a[i]>='A'&&a[i]<='Z'){ a[i]=b[int(a[i]-'A')]+32; } }cout<<a; return 0; }