#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
using ll = long long;
constexpr long long MOD = 1000000007;
constexpr long long MOD2 = 998244353;
constexpr long long INF = 1LL << 60;
const long double PI = acosl(-1.0);
constexpr long double EPS = 1e-11;
template<class T> inline bool chmin(T& a, T b) {
	if (a > b) {
		a = b;
		return true;
	}
	return false;
}
template<class T> inline bool chmax(T& a, T b) {
	if (a < b) {
		a = b;
		return true;
	}
	return false;
}
int main(){
    string s = "kyoprotenkei90";
    string t;
    cin >> t;
    sort(s.begin(), s.end());
    sort(t.begin(), t.end());
    if (s == t) cout << "Yes" << endl;
	else
        cout << "No" << endl;
}