def heuristic(point1, point2):
    """
    Returns the distance between two points.
    params:
        point1 (int tuple): first  point
        point2 (int tuple): second point
    return:
        dist (int): Manhattan (aka L) distance between the points
    """
    x1, y1 = point1
    x2, y2 = point2

    dist = abs(x1-x2) + abs(y1-y2)

    return dist