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