#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;
  vector<int> cnt(26);
  for (char c : s) cnt[c - 'a']++;
  string t = "kadomatsu";
  for (char c : t) cnt[c - 'a']--;
  bool ok = true;
  rep(i, 26) if (cnt[i] > 0) ok = false;
  cout << (ok ? "Yes" : "No") << '\n';
  return 0;
}