#include<bits/stdc++.h>
using namespace std;
using ll = long long int;
using ld = long double;
const ll MAX = 5000000000000000000;
const ld PI = 3.14159265358979;
const ll MOD = 0;//2024948111;
random_device rd;
mt19937 mt(rd());
ld dotorad(ld K){return PI * K / 180.0;}
ld radtodo(ld K){return K * 180.0 / PI;}
int main(){
    string S;
    cin >> S;
    string T = "kyoprotenkei90";
    sort(S.begin(),S.end());
    sort(T.begin(),T.end());
    if(S == T) cout << "Yes" << endl;
    else cout << "No" << endl;
}