s=input()
k="kadomatsu"
n=len(s)

for i in range(2**9):
	r=bin(i)[2:]
	r="0"*(9-len(r))+r
	if r.count("1")==n:
		S=""
		for j in range(9):
			if r[j]=="1":
				S+=k[j]
		if S==s:
			print("Yes")
			exit()
print("No")