from typing import Sequence


def isRotation(L: Sequence, M: Sequence) -> bool:
    """Check if M is a rotation of L."""
    L = list(L)
    M = list(M)
    if not len(L) == len(M):
        return False
    if not L and not M:
        return True
    for i in range(len(L)):
        if L[i:] + L[:i] == M:
            return True
    return False


print("Testing isRotation()...", end="")
assert isRotation([2, 3, 4, 5, 6], [4, 5, 6, 2, 3]) == True
assert isRotation([2, 3, 4, 5, 6], [2, 3, 4, 5, 6]) == True
assert isRotation([2, 3, 4, 5, 6], [2, 4, 3, 5, 6]) == False
assert isRotation([1], []) == False
assert isRotation([], []) == True
print("Passed!")