#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() using namespace std; int main(){ char a,b,c,d; cin>>a>>b>>c>>d; a=(a+1-'a')%26+'a'; b=(b+1-'b')%26+'b'; c=(c+1-'c')%26+'c'; d=(d+1-'d')%26+'d'; cout<<a<<b<<c<<d; return 0; }