-ana aaaa aaab aaan aaar aaas aaba aabb aana aaon aaoo aara aaro aars aasa aass abaa abab aban abar abas abb- abba abbb abbo abbr abbs aboa abob abon aboo abor abos abra abro abrs abs- absa abss ana- anaa anab anan anao anar anas anba anbb anbo anna annb anno anns ano- anoa anon anor anos ansa anso aoba aonb aono aora aorb aorn aors aoss arab aran arar aras arba arbs arna arno arns aroa arob aron aroo aror aros arr- arra arro arrr arrs ars- arsa arso asaa asab asan asao asar asas asba asbo asno asob ason asor asos asra asro asrs assa assn asso assr asss baaa baan baar baas baba babb babo babr babs bana bann bano banr bans baon baos bar- bara barb barn baro barr bars basa baso bass bbas bbbb bbbs bnas bnor bnrr bnss boab boan boar boas boba bobb bobo bobs bona bonn bono bons boob boon boor boos bor- bora born boro borr bors bosa bosn boso boss brab bran brao bras brna brno brns broa brob bron broo bror bros brrr brrs brsb brsr bsaa bsas bsns bson bsos bsra naaa naab naan naar naas naba nabo nabs nan- nana nanb nann nano nans naor naos nara narn naro narr nars nas- nasa nasb naso nasr nass nbaa nbar nbas nbbo nnnn nnos nnsa nnss noaa noba nobo nobs non- nona nonn nono nons noo- noob noon nooo noor noos nor- nora norb norn noro norr nors nos- nosa noss nrab nras nrna nron nrsa nsaa nsar nsbo nsna nsnr nsos nsra nssa nssb nsso nssr nsss oara oars oass oban obas obba obbo obon obor obos obra obro obsn obsr obss onab onan onar onas onna onno onon onor onos onra onso ooaa ooba oona oons oooo ooos oora oosa orab oran orao orar oras orba orbb orbo orbs orna orno orns oro- oron oror oros orra orro orrs orsa orso osan osar osas osba osno osnr osoo osor osos osro ossa ossb osso raab raan raas raba rabb rabo rabs rana rann rano rans raob raos rara rarb raro rars rasa raso rass rbbb rbbr rbbs rbss rnas rnbr roab roan roar roas rob- roba robb robo robs rona rono rons roob roon roor roos rora roro rosa roso ross rras rrna rrrr rsaa rsna rsnn rsno rsnr rsos rssa s-os saab saan saar saas saba sabb sabo sabr sabs sana sann sano sanr sans saon saor saos sara sarn saro sarr sars sasa saso sass sbaa sbar sbas sbbs sbor sbsa snab snar snas snba snns snoa snob snoo snor snos snra snrs soan soar soas soba sobo sobr sobs son- sona sono sons soon soor soos sora sorb sorn soro sorr sors sosa soso soss sras srna srnn srno sros ssaa ssab ssan ssao ssas ssbn ssbr ssns ssra ssrs sssa sssb ssss