#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <queue>
#include <map>
#include <cmath>
#include <iomanip>

using namespace std;

const long long MOD = (long long)(1e9) + 7;

int main() {

  //cout << fixed << setprecision(15);

  string s;
  cin >> s;
  sort(s.begin() , s.end());
  string t  = "kyoprotenkei90";
  sort(t.begin() , t.end());
  cout << (s == t ? "Yes" : "No") << endl;
  return 0;
}