#include<bits/stdc++.h> using namespace std; char a,b,c,d; int main(){ cin>>a>>b>>c>>d; cout<<char((a-'a'+1)%26+'a')<<char((b-'a'+1)%26+'a') <<char((c-'a'+1)%26+'a') <<char((d-'a'+1)%26+'a'); return 0; }