-ana aaaa aaab aaan aaap aaas aaba aabb aabp aana aanp aapa aaps aasa aass abaa abab aban abap abas abb- abba abbb abbs abpa abpn abpp abps abs- absa absp abss ana- anaa anab anan anap anas anba anbb anna annb anns anp- anpa anpp ansa ansp apan apap apas apba apbs apna appa apps apsa apss asaa asab asan asap asas asba aspa asps assa assn assp asss baaa baan baas baba babb babs bana bann banp bans bapa bapp baps basa bass bbas bbbb bbbs bnas bnpp bnss bpsa bsaa bsap bsas bsns bspp naaa naab naan naas naba nabs nan- nana nanb nann nanp nans napa napb napp naps nas- nasa nasb nasp nass nbaa nbap nbas nbpa nbpp nbps nbsp nnnn nnsa nnss npap npas nppa npsa npss nsaa nsna nsps nssa nssb nssp nsss paan paap paas paba pan- pana pann pans papa papb papp paps pasa pasp pass pban pbpa pbsa pbsp pnas pnpp ppan ppap pppa pppn pppp ppps ppss psap psas psna pspp psps pssa saab saan saap saas saba sabb sabs sana sann sans sapa sapp saps sasa sass sbaa sbas sbbs sbsa sbsp snab snap snas snba snns snpp sp-a span spap spas spns spps spsa spsp spss ssaa ssab ssan ssap ssas ssbn ssns sspa ssps sssa sssb ssss