#include <bits/stdc++.h>
#define rep(i, l, r) for (int i = (l); i < (r); i++)
using namespace std;

typedef long long ll;

int main() {
    string S, T = "kyoprotenkei90";
    cin >> S;
    sort(S.begin(), S.end());
    sort(T.begin(), T.end());
    if (S == T) cout << "Yes" << endl;
    else cout << "No" << endl;
}