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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

int main() {
  string s;
  cin >> s;

  string t = "kadomatsu";
  rep(bit, 1<<9) {
    string cand;
    rep(i, 9) {
      if (bit>>i&1) cand.push_back(t[i]);
    }

    if (s==cand) {
      cout << "Yes" << endl;
      return 0;
    }

  }
  cout << "No" << endl;


}