-ana aaaa aaab aaac aaan aaap aaba aabb aabc aabp aaca aacb aacc aacn aacp aana aanp aapa aapc abaa abab abac aban abap abb- abba abbb abca abcb abcc abcn abcp abpa abpc abpn abpp acaa acab acac acan acap acba acca accc accp acpa ana- anaa anab anac anan anap anba anbb anca ancc anna annb anp- anpa anpp apac apan apap apba apca apcb apcc apcn apna appa appc baaa baan baba babb bac- baca bacc bacn bana banc bann banp bapa bapc bapp bbbb bcaa bcap bcbc bcbp bcca bccc bcpp bnpp bpcp caaa caab caac caan caap caba cac- caca cacc cana canc cann canp capa capb capc capn capp cbac cbbc cbca cbcc cbcn cbcp cbna cbpc cbpp ccaa ccab ccac ccap ccba ccbc ccbn ccca cccb cccc cccp ccna ccnb ccnc ccnp ccpa ccpn ccpp cnaa cnac cnap cnbc cnbp cncp cnna cnpa cpaa cpac cpan cpap cpbc cpca cpnb cppa naaa naab naac naan naba nabc naca nacc nacp nan- nana nanb nann nanp napa napb napp nbaa nbap nbbc nbca nbcc nbpa nbpp ncaa ncac ncap ncba ncbc ncca nccc nccn nccp ncna ncnc ncpa ncpc nnnn npac npap npca npcc nppa nppc paan paap paba paca pan- pana panc pann papa papb papp pbac pban pbcc pbpa pcaa pcap pcba pcbc pcca pccc pcpb pcpn pcpp pnac pnca pnpp ppac ppan ppap ppcc pppa pppn pppp