#include<stdio.h>
int main()
{
	char s[16];
	scanf("%s", s);
	int i, j, n, m;
	for (n = 0; s[n] != '\0'; n++);
	char t[16] = "kadomatsu";
	m = 9;
	t[m] = '\0';
	for (i = j = 0; i < n; i++)
	{
		while (j < m && t[j] != s[i])
			j++;
		if (j == m)
		{
			printf("No\n");
			return 0;
		}
		j++;
	}
	printf("Yes\n");
	return 0;
}