#include<bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    string s,std = "kyoprotenkei90";
    cin >> s;
    sort(s.begin(),s.end());
    sort(std.begin(),std.end());
    
    cout << (s == std ? "Yes" : "No") << endl;
    return 0;
}