#include<iostream> using namespace std; int main(){ char a,b,c,d; cin >> a >> b >> c > d; a=(a-97+1)%26+97; b=(b-97+1)%26+97; c=(c-97+1)%26+97; d=(d-97+1)%26+97; cout << a << b << c << d; return 0; }