def manhattan_distance(origin, destination):
    """Return the Manhattan distance between the origin and the destination.

    @type origin: Location
    @type destination: Location
    @rtype: int

    >>> pt1 = Location(1,2)
    >>> pt2 = Location(3,4)
    >>> print(manhattan_distance(pt1, pt2))
    4
    """
    return (abs(origin.row - destination.row) +
            abs(origin.column - destination.column))