-ana aaaa aaab aaan aaas aaav aaba aabb aana aaon aaoo aasa aass aava abaa abab aban abas abb- abba abbb abbo abbs aboa abob abon aboo abos abov abs- absa abss abva ana- anaa anab anan anao anas anba anbb anbo anna annb anno anns ano- anoa anon anos ansa anso aoba aonb aono aoss asaa asab asan asao asas asba asbo asno asob ason asos assa assn asso asss asva asvs avab avan avao avas avon avos avva avvo baaa baan baas baba babb babo babs bana bann bano bans baon baos basa baso bass bava bbas bbbb bbbs bnas bnss boab boan boas boba bobb bobo bobs bona bonn bono bons boob boon boos bosa bosn boso boss bova bovo bsaa bsas bsns bson bsos naaa naab naan naas naba nabo nabs nan- nana nanb nann nano nans naos nas- nasa nasb naso nass nasv nava navo navs navv nbaa nbas nbbo nnnn nnos nnsa nnss noaa noba nobo nobs non- nona nonn nono nons noo- noob noon nooo noos noov nos- nosa noss nov- nova novo nsaa nsbo nsna nsos nssa nssb nsso nsss nvss oass oavs oban obas obba obbo obon obos obsn obss obvs onab onan onas onna onno onon onos onso ooaa ooba oona oons oooo ooos oosa osan osas osba osno osoo osos osov ossa ossb osso ovan ovo- ovon ovoo s-os saab saan saas saba sabb sabo sabs sana sann sano sans saon saos sasa saso sass sava savo savs sbaa sbas sbbs sbsa snab snas snav snba snns snoa snob snoo snos snov soan soas soba sobo sobs son- sona sono sons soon soos sosa soso soss sosv sova sovo sovs ssaa ssab ssan ssao ssas ssbn ssns sssa sssb ssss svan svns vaan vaas vabs vana vann vano vans vas- vasa vaso vass vava vavs vnav vnso vona vonn vons vosa voso voss vsan vvob vvsb vvvv