import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		char[] s = sc.next().toCharArray();
		sc.close();

		char[] t = "kadomatsu".toCharArray();
		int j = 0;
		for (int i = 0; i < t.length; i++) {
			if (j == s.length) {
				break;
			}
			if (s[j] == t[i]) {
				j++;
			}
		}
		if (j == s.length) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}