// code by lynmisakura. wish to be accepted!
#include<bits/stdc++.h>
using namespace std;

#define REP(i,N) for(int i = 0;i < N;i++)
using ll = long long;

int main(void){
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(15);
  
  string s,t;
  cin >> s;
  t = "kyoprotenkei90";
  sort(s.begin(),s.end());
  sort(t.begin(),t.end());

  if(s == t){
    cout << "Yes" << '\n';
  }else{
    cout << "No" << '\n';
  }

}