#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  string S;
  cin>>S;
  string T = "kyoprotenkei90";
  sort(S.begin(),S.end());
  sort(T.begin(),T.end());
  if(S == T) cout<<"Yes"<<endl;
  else cout<<"No"<<endl;
}