#pragma GCC optimize("Ofast", "unroll-loops")

#include <bits/stdc++.h>

using namespace std;

int main(void){
    string cmp = "kyoprotenkei90";
    string S; cin >> S;
    sort(cmp.begin(), cmp.end());
    sort(S.begin(), S.end());
    if (S == cmp) cout << "Yes" << endl;
    else cout << "No" << endl;
    return 0;
}