#include <iostream>
#include <string>
#include <map>

using namespace std;

int main(){
    map<char, int> kyopro;
    string e = "kyoprotenkei90";
    for (auto x : e){
        kyopro[x]++;
    }

    string s;
    cin >> s;

    for (auto x : s){
        kyopro[x]--;
    }

    bool yes = true;
    for (auto x : s){
        if (kyopro[x] != 0) yes = false;
    }

    if (yes) cout << "Yes" << endl;
    else cout << "No" << endl;
}