#include <bits/stdc++.h>
#define rep(i, n)for(int i=0,i<(n);++i)
using namespace std;
using ll = long long;

int main(){
  string s; cin >> s;
  string k = "kadomatsu";
  for(int i = 0; i < (1<<9); i++){
    string t = "";
    for(int j = 0; j < 9; j++){
      if((i>>j)&1>0) t += k[j];
    }
    if(s==t){
      cout << "Yes" << endl;
      return 0;
    }
  }
  cout << "No" << endl;
  return 0;
}