#include<cstdio>
#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) printf("Yes\n");
    else printf("No\n");
	return 0;
}