-ana aaaa aaab aaac aaan aaap aaba aabb aabc aabp aaca aacb aacc aacn aaco aacp aana aanp aaon aaoo aapa aapc aapo abaa abab abac aban abap abb- abba abbb abbo abca abcb abcc abcn abcp aboa abob abon aboo abpa abpc abpn abpp acaa acab acac acan acap acba acca accc acco accp acoa acon acop acpa ana- anaa anab anac anan anao anap anba anbb anbo anca ancc anco anna annb anno ano- anoa anon anp- anpa anpp aoba aoca aonb aono aopo apac apan apao apap apba apca apcb apcc apcn apco apna apno apo- apoc apon apoo apop appa appc baaa baan baba babb babo bac- baca bacc bacn baco bana banc bann bano banp baon bapa bapc bapp bbbb bcaa bcap bcbc bcbp bcca bccc bcpp bnoc bnpp boab boac boan boba bobb bobo boca boco bona bonc bonn bono boob booc boon boop bopa bopp bpcp c-bo caaa caab caac caan caap caba cabo cac- caca cacc caco cana canc cann cano canp capa capb capc capn capo 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 ccob ccoc ccpa ccpn ccpp cnaa cnac cnap cnbc cnbp cnco cncp cnna cnpa coan coba cobb cobo coca coco cocp con- cona conc conn cono coob coon coop copa copo copp cpaa cpac cpan cpap cpbc cpca cpnb cppa naaa naab naac naan naba nabc nabo naca nacc naco nacp nan- nana nanb nann nano nanp naoc napa napb napo napp nbaa nbap nbbc nbbo nbca nbcc nbco nbpa nbpp ncaa ncac ncap ncba ncbc ncca nccc nccn nccp ncna ncnc ncoa ncoc ncpa ncpc nnnn noaa noac noap noba nobc nobo noco non- nona nonn nono noo- noob noon nooo noop npac npap npca npcc nppa nppc oban obba obbo obon ocab ocac ocan ocap ocbc occa occc occn ocna ocon ocpa ocpp onab onan onc- onca onco onna onno onon ooaa ooba oona oooo opan opap opca opo- opon oppa oppo paan paap paba paca paco pan- pana panc pann pano paoc paon papa papb papp pbac pban pbcc pboc pbpa pcaa pcap pcba pcbc pcca pccc pcoa pcpb pcpn pcpp pnac pnca pnon pnpo pnpp poan poba pobo poca poco pona ponc pono ponp poon poop pop- popa popc popo popp ppac ppan ppap ppcc ppoa pppa pppn pppo pppp