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

int main() {
  
  ios::sync_with_stdio(false);
  cin.tie(0);
  
  string s = "kyoprotenkei90";
  sort(s.begin(),s.end());
  string g;
  cin >> g;
  sort(g.begin(),g.end());
  if (s == g) cout << "Yes" << endl;
  else cout << "No" << endl;
}