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