#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> P;
typedef vector<ll> VI;
typedef vector<VI> VVI;
#define REP(i,n) for(int i=0;i<(n);i++)
#define ALL(v) v.begin(),v.end()
constexpr ll MOD=1000000007;
constexpr ll INF=1e18;

int main(){
    string s; cin >> s;
    string t="kadomatsu";
    REP(i,1<<9){
        string u="";
        REP(j,9){
            if(i>>j&1)
                u.push_back(t[j]);
        }
        if(s==u){
            cout << "Yes" << endl;
            return 0;
        }
    }
    cout << "No" << endl;
    return 0;
}