#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
    string s;
    cin >> s;

    string t = "kyoprotenkei90";
    sort(t.begin(), t.end());
    sort(s.begin(), s.end());

    cout << (t == s ? "Yes" : "No") << endl;

    return 0;
}