#include <bits/stdc++.h>
using namespace std;
int main(){
  string S;
  cin >> S;
  string T = "kadomatsu";
  bool ok = false;
  for (int i = 0; i < (1 << 9); i++){
    string T2;
    for (int j = 0; j < 9; j++){
      if (i >> j & 1){
        T2 += T[j];
      }
    }
    if (S == T2){
      ok = true;
    }
  }
  if (ok){
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}