#define _USE_MATH_DEFINES

#include <iostream>	//cin, cout
#include <vector>	//vector
#include <algorithm> //sort,min,max,count
#include <string>	//string,getline, to_string
#include <ios>		//fixed
#include <iomanip>	//setprecision
#include <utility> //swap, pair
#include <cstdlib>	//abs(int)
#include <cmath>	//sqrt,ceil,M_PI, pow, sin
#include <sstream>	//stringstream, getline
#include <numeric>	//gcd, accumlate
#include <deque>	//deque
#include <random>	//randam_device
#include <limits>	//numeric_limits

using namespace std;
constexpr long long int D_MOD = 1000000007;


int main() {

	string S;
	cin >> S;

	if (S.length() != 14) {
		cout << "No" << endl;
		return 0;
	}

	bool flg = true;
	string temp = "kyoprotenkei90";
	
	for (unsigned int i = 0; i < temp.length(); i++) {
		flg = false;
		for (unsigned int j = 0; j < S.length(); j++) {
			if (temp[i] == S[j]) {
				flg = true;
				S[j] = 'z';
				break;
			}
		}
		if (!flg) {
			cout << "No" << endl;
			return 0;
		}
	}

	cout << "Yes" << endl;

	return 0;

}