#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<<endl; return 0; }