#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a,b,c,d; cin>>a>>b>>c>>d; cout<<(a+1-'a')%26+'a'<<(b+1-'a')%26+'a'<<(c+1-'a')%26+'a'<<(d+1-'a')%26+'a'; }