#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for (int i = 0; i < (int)(n); i++)
#define RREP(i, n) for (int i = (int)(n); i >= 0; i--)
#define rep(i, a, n) for (int i = (a); i < (int)(n); i++)
#define rrep(i, a, n) for (int i = (a); i >= (int)(n); i--)
#define ALL(obj) (obj).begin(), (obj).end()
#define rALL(obj) (obj).rbegin(), (obj).rend()
using ll = long long;
using vi = vector<int>;
using vii = vector<vector<int>>;
using P = pair<int, int>;

int main() {
    string S;
    cin >> S;
    string s = "kyoprotenkei90";
    sort(ALL(S));
    sort(ALL(s));
    bool ans = false;
    if(s == S) ans = true;
    cout << (ans ? "Yes" : "No") << endl;
}