#include<bits/stdc++.h>
// #include<atcoder/all>

using namespace std;
// using namespace atcoder;
using ll = long long;
using ull = unsigned long long;
using P = pair<int,int>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
#define MOD 1000000007


int main(){
  
  string s;
  cin >> s;
  string t = "kadomatsu";
  reverse(ALL(t));
  reverse(ALL(s));
  while(1){
    if(s[0] == t[0]){
      s.pop_back();
      t.pop_back();
    }else{
      t.pop_back();
    }
    if(s.empty()){
      cout << "Yes\n";
      break;
    }
    if(t.empty()){
      cout << "No\n";
      break;
    }
  }

  

  return 0;
}