#include <iostream>
#include <algorithm>
using namespace std;
int main(){
  string s = "kyoprotenkei90";
  string t;cin>>t;
  sort(s.begin(),s.end());
  sort(t.begin(),t.end());
  if(s == t){
    cout << "Yes" << endl;
  }else{
    cout << "No" << endl;
  }
}