def _intersection(l0, l1, e=1e-06):
    """intersection of lines."""
    a0, b0, c0 = l0
    a1, b1, c1 = l1
    w = a0 * b1 - a1 * b0
    x = b0 * c1 - b1 * c0
    y = c0 * a1 - c1 * a0
    if abs(w) < e:
        raise ZeroDivisionError
    return x / w, y / w
