12. list23-24 *list9-10 list17-18 list21-22 list23-24 13.*list11-12 list19-20 list23-24 14.*list13-14 list21-22
15.*list1-2 list15-16 list23-24 16.*list3-4 list17-18 17.*list5-6 list19-20 18.*list7-8 list21-22 19.*list9-10 list23-24 20.*list11-12 21.*list13-14 22.*list15-16 23.*list17-18 24.*list19-20 25.*list21-22 26.*list23-24