#include<iostream>
#include<string>
using namespace std;
int main(){
  string str;
  getline(cin,str);
  
  for(int i=0;i<str.size();i++){
    
    if(str[i] >= 'a' && str[i] <= 'z'){
      int a = (26+(str[i]-'a'-4))%26;
      str[i] = ('a'+a);
    }
    cout << str[i];
  }
  cout << endl;
  return (0);
}