#include <bits/stdc++.h>

using namespace std;

int main(){
    string s, t;
    cin >> s;
    t = "kyoprotenkei90";
    map<char, int> m, n;
    for(auto a : s) m[a]++;
    for(auto a : t) n[a]++;
    bool ans = true;
    for(auto [a, b] : m){
        if(b != n[a]) ans = false; 
    }
    if(ans) cout << "Yes" << endl;
    else cout << "No" << endl;
}