#include <iostream>
#include <string>
#include <algorithm>

using namespace std;
string x = "kyoprotenkei90";
int main(){
    string s; cin >> s;
    sort(s.begin(),s.end()); sort(x.begin(),x.end());
    if(s==x) cout << "Yes" << endl;
    else cout << "No" << endl;
}