#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define ll long long
#define rep(i,n) for (int i = 0; i < (n); i++)
#define coutf(f) cout << fixed << setprecision(f)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()

int main() {
	string t = "kyoprotenkei90";
	string s;
	cin >> s;
	sort(all(s));
	sort(all(t));
	if (s == t) cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}