#include<bits/stdc++.h>
using namespace std;

int main() {
	string s;
	getline(cin,s);
	for(int i=0;i<s.size();i++){
		if(islower(s[i])){
			if(s[i]=='z') s[i]='a';
			else s[i]=s[i]+1;
		}
		cout<<s[i];
	}
	return 0;
}
/**************************************************************
	Problem: 1873
	User: linzihang
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2076 kb
****************************************************************/