moji = "kadomatsu"

num = 1 << len(moji)

kouho = set()
for i in range(num):
    temp = ""
    for j in range(num):
        if (i >> j) & 1:
            temp += moji[j]
    kouho.add(temp)

s = input()
if s in kouho:
    print("Yes")
else:
    print("No")