/**
*    author:  shu8Cream
*    created: 29.01.2021 20:56:25
**/

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i=0; i<(n); i++)
#define all(x) (x).begin(), (x).end()
using ll = long long;
using P = pair<int,int>;
using vi = vector<int>;
using vvi = vector<vi>;

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    string s;
    cin >> s;
    string key = "kadomatsu";
    int pos=-1;
    bool ok = false;
    vector<string> ans;
    rep(s,1<<9){
        string tmp;
        rep(i,9){
            if(s>>i&1) tmp+=key[i];
        }
        ans.push_back(tmp);
    }
    rep(i,ans.size()) if(s==ans[i]) ok=true;
    cout << (ok ? "Yes" : "No") << endl;
}