from itertools import product

def f(S):
    X="kadomatsu"
    for t in product([0,1],repeat=len(X)):
        Y=""
        for i in range(len(X)):
            if t[i]:
                Y+=X[i]
        if S==Y:
            return True
    return False

S=input()
print("Yes" if f(S) else "No")