#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;

const ld pi = 3.14159265358979;
const int mod = 1000000007;

int main(){
	string s;
	cin >> s;
	string k = "kadomatsu";
	int n = k.size();
	for(int i = 0; i < (1 << n); i++){
		string t;
		for(int j = 0; j < n; j++){
			if(i & (1 << j)){
				t += k[j];
			}
		}
		//cout << t << endl;
		if(t == s){
			cout << "Yes" << endl;
			exit(0);
		}
	}
	cout << "No" << endl;
	return 0;
}