def f(S):
    X="kadomatsu"
    if X==S:
        return True

    if S==X[:-1]:
        return True

    if len(S)>=9:
        return False

    for i in range(len(X)):
        if S==X[:i]+X[i+1:]:
            return True

    return False

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