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

int main() {
  string S, kdmt = "kadomatsu";
  cin >> S;

  for (int tmp = 0; tmp < (1 << 9); tmp++) {
    bitset<9> a(tmp);

    string T = "";
    for (int i = 0; i < 9; i++) {
      if (a.test(i))
        T += kdmt.at(i);
    }

    if (T == S) {
      cout << "Yes" << endl;
      return 0;
    }
  }

  cout << "No" << endl;
}