#include<iostream>
using namespace std;
int main(){ 
  char a[80];
  int i;
  while(cin>>a[i]){
    if(a[i]>='a'&&a[i]<='z')cout<<(char)(a[i]-4);
    else cout<<a[i];
    i++;
  }
  cout<<endl;
  return 0;
}