#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)n; i++)
using namespace std;
using ll = long long;

int main() {
    string s;
    cin >> s;
    vector<char> a, b;
    string t = "kyoprotenkei90";
    for (auto i : s) {
        a.push_back(i);
    }
    for (auto i : t) {
        b.push_back(i);
    }
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    if(a == b) cout << "Yes" << endl;
    else cout << "No" << endl;
}