-ana aaaa aaab aaan aaap aaba aabb aabp aabt aana aanp aaon aaoo aapa aapo aapt aata aatt abaa abab aban abap abat abb- abba abbb abbo abbt aboa abob abon aboo abot abpa abpn abpp abta ana- anaa anab anan anao anap anat anba anbb anbo anna annb anno annt ano- anoa anon anp- anpa anpp ant- anta anto antt aoba aonb aono aont aopo apan apao apap apat apba apna apno apo- apon apoo apop apot appa appt apta aptn aptt at-t ataa atab atan atap atat atna atno atob aton atop atot atta attn atto attp baaa baan baat baba babb babo bana bann bano banp bant baon bapa bapp bapt bata batn bato batt bbbb bnpp bnta boab boan boat boba bobb bobo bona bonn bono bont boob boon boop boot bopa bopp bota botb botn boto bott bpot btaa btan btbp btob bttb naaa naab naan naat naba nabo nan- nana nanb nann nano nanp nant naot napa napb napo napp napt nata nato natp natt nbaa nbap nbbo nbpa nbpp nnnn nnot nntn noaa noap noat noba nobo non- nona nonn nono nont noo- noob noon nooo noop noot not- nota noto nott npap npat nppa npta nptn ntap ntop ntpa ntto oban obba obbo obon obot onab onan onat onna onno onon onpt ont- onto ooaa ooba oona oont oooo ootb ootp opan opap opo- opon oppa oppo optn opto otan otap oto- oton otoo otpp otta otto paan paap paat paba pabt pan- pana pann pano pant paon papa papb papp pata pato patt pban pbpa pnon pnot pnpo pnpp poan poat poba pobo pona pono ponp pont poon poop poot pop- popa popo popp popt pota poto pott ppan ppap ppoa pppa pppn pppo pppp ppta pptn pptt ptab ptop taa- taan taat taba tabb tabo tana tann tano tant taoa tapa tapo tapp tapt tata tatb tato tatt tbta tbtp toab toan toat toba tobo tobt tona tonb tonn tono tooa toon toot top- topa topo topp topt tota toto tott tpap tpon tppa tppp tptp ttab ttbb tton ttop tttt