#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#ifdef LOCAL
#include "debug.hpp"
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...)
#endif

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);

  string S; cin >> S;
  string T = "kyoprotenkei90";
  sort(S.begin(), S.end());
  sort(T.begin(), T.end());

  string ans = "Yes";
  for (ll i = 0; i < 14; i++) {
    if (S[i] != T[i]) ans = "No";
  }
  cout << ans << '\n';
  return 0;
}