#include <iostream>
#include <string>
#include <cstdio>
using namespace std;

int main(void){
    string str;
    int flg = 0;
    
    while(1){
        getline(cin,str);
        
        for(int i = 0 ; i < str.size() ; i++){
            if('a' <= str[i] && str[i] <= 'z') cout << (char)('a'+(str[i]-'a'+26-4)%26);
            else cout << str[i];
            if(str[i] == '.') flg = 1;
        }
        if(flg) break;
    }
    puts("");
    
    return 0;
}