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

bool solve() {
    string S;
    cin >> S;
    string t = "kyoprotenkei90";
    sort(t.begin(), t.end());
    sort(S.begin(), S.end());

    return S == t;
}

int main() {
    string ans = solve() ? "Yes" : "No";
    cout << ans << "\n";
    return 0;
}