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

int main(){
  string S; cin>>S;
  string T="kadomatsu";
  size_t p=0;
  for(char c:S) { size_t buf=T.find(c,p); if(buf==string::npos){ p=buf; break; } p=buf+1; }
  cout<<((p==string::npos)?"No":"Yes")<<endl;
  return 0;
}