A = "kadomatsu"; LA = len(A)
S = str(input())

if len(S) > len(A):
    print("No");exit()

for i in range(1<<LA):
    temp = ""
    for j in range(LA):
        if (i>>j)&1 == 1:
            temp += A[j]
    if S == temp:
        print("Yes");exit()
print("No")