#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <set>
#include <stack>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std; // NOLINT

int main() {
    string s;
    cin >> s;
    string t = "kyoprotenkei90";
    sort(s.begin(), s.end());
    sort(t.begin(), t.end());
    cout << (s == t ? "Yes" : "No") << endl;
    return 0;
}