#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  string s;
  cin >> s;
  string t = "kadomatsu";
  rep(bit, 1 << t.size()) {
    string u = "";
    rep(i, t.size()) {
      if (bit & (1 << i)) u += t[i];
    }
    if (u == s) {
      cout << "Yes" << '\n';
      return 0;
    }
  }
  cout << "No" << '\n';
  return 0;
}