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

int main(){
  string s;
  cin>>s;
  string t="kadomatsu";
  int cur=0;
  for(int i=0;i<s.length();i++){
    if(cur>8){
      cout<<"No"<<endl;
      return 0;
    }
    while(s.at(i) != t.at(cur)){
      cur++;
      if(cur>8){
        cout<<"No"<<endl;
        return 0;
      }
    }
    //cout<<i<<" "<<cur<<endl;
    cur++;
  }
  //cout<<cur<<endl;

  cout<<"Yes"<<endl;
  return 0;
}