#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int INF = 1e+9;
const ll LINF = (ll)pow(10,18);

int main(){
    string s;
    cin >> s;

    set<char> sc;

    for(int i=0; i<s.size(); i++) sc.insert(s[i]);

    string ans = "kyoprokentei90";

    for(int i=0; i<14; i++) if(!sc.count(ans[i])){
        cout << "No" << endl;
        return 0;
    }

    cout << "Yes" << endl;
}