def _interaction_to_trel_2b_map(cured_2bt_lists):
    """Based on two body term line data, constructs a map
        (particle1, particle2, (a, b, c, d)) -> 2 body term,
    where 'particle1' and 'particle2' are 3-tuples (j, p, Tz)
    :param cured_2bt_lists: list of two body term line data, which has been
    converted into the correct types (floats, ints, etc)
    """
    return {(tuple(l[0:3]), tuple(l[3:6]), tuple(l[6:10])): l[10]
            for l in cured_2bt_lists}