s = input()
n = len(s)
t = "kadomatsu"
f = False
for i in range(1, 1 << 9):
    tmp = ""
    for j in range(9):
        if i & (1 << j):
            tmp += t[j]
    if s == tmp:
        f = True
if f:
    print("Yes")
else:
    print("No")