#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

int main() {
	string S; cin >> S;
	string T = "kyoprotenkei90";
	sort(S.begin(), S.end());
	sort(T.begin(), T.end());

	if (S == T) cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}