#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
int main() {
	string k = "kyoprotenkei90";
	string s;
	cin >> s;
	sort(k.begin(), k.end());
	sort(s.begin(), s.end());
	if (k == s) {
		cout << "Yes" << endl;
	}
	else {
		cout << "No" << endl;
	}
}