#include <bits/stdc++.h>
#include <vector>
using namespace std;
string str;	
int a, b, c, d;
int main(){
	getline(cin, str);
	a = str.length();
	for(int i = 0; i < a; i++){
		if(str[i] < 97 || str[i] > 122){
			cout << str[i];
		}
		else {
			b = (int)str[i];
			b = b - 4;
			if(b < 97)
				b = b + 26;
			cout << (char)b;
		}
	}
	return 0;
}