#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("YES");}else{puts("NO");}
#define MAX_N 200005

int main() {
    string s; cin >> s;
    string t = "kadomatsu";
    int n = 9;
    rep(i,1<<n){
        bitset<20> bi(i);
        string tt;
        rep(j,n){
            if(bi[j]) tt += t[j];
        }
        if(tt == s){
            cout << "Yes" << endl;
            return 0;
        }
    }

    cout << "No" << endl;
    return 0;
}