import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] org = "kadomatsu".toCharArray();
        char[] arr = sc.next().toCharArray();
        int idx = 0;
        for (int i = 0; i < org.length && idx < arr.length; i++) {
            if (org[i] == arr[idx]) {
                idx++;
            }
        }
        if (idx < arr.length) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        }
    }
}