-ana aaaa aaab aaaf aaan aaas aaba aabb aafa aafb aaff aana aaon aaoo aasa aasf aass abaa abab abaf aban abas abb- abba abbb abbo abbs abff aboa abob abof abon aboo abos abs- absa absf abss afaa afan afao afbs affa affo affs afoa afoo afsa afsb ana- anaa anab anan anao anas anba anbb anbo anfa anfo anna annb anno anns ano- anoa anon anos ansa ansf anso aoba aonb aono aoss asaa asab asaf asan asao asas asba asbo asfa asno asob asof ason asos assa assn asso asss baaa baaf baan baas baba babb babo babs baff bafo bana bann bano bans baon baos basa basf baso bass bbas bbbb bbbs bbfn bfas bffs bnas bnss boab boan boas boba bobb bobo bobs bofa boff bofs bona bonn bono bons boob boof boon boos bosa bosn boso boss bsaa bsas bsfa bsff bsfs bsns bson bsos faaa faan faas faba fabo fabs fafa faff fafo fana fano fans faon fasa fasn faso fass ffff ffsa ffss foaf foan foba fobs fofo fono fons foof foon foos fosa fosb foso foss fsas fsfo fssa fssf naaa naab naan naas naba nabf nabo nabs nafa naff nafo nafs nan- nana nanb nann nano nans naos nas- nasa nasb nasf naso nass nbaa nbaf nbas nbbo nbfa nfaa nfas nfff nfon nnnn nnos nnsa nnss noaa noba nobo nobs non- nona nonn nono nons noo- noob noon nooo noos nos- nosa noss nsaa nsbo nsfs nsna nsof nsos nssa nssb nssf nsso nsss oafo oafs oass oban obas obba obbo obon obos obsn obss ofan ofas off- offa offo offs ofna ofno onab onan onas onna onno onon onos onso ooaa ooba ooff oofs oona oons oooo ooos oosa osaf osan osas osba osfa osno osoo osos ossa ossb osso s-os saab saaf saan saas saba sabb sabo sabs safa safb saff safo sana sann sano sans saon saos sasa sasf saso sass sbaa sbas sbbs sbsa sfas sfba sfnb sfos sfss snab snas snba snns snoa snob snoo snos soan soas soba sobo sobs sofa sofo son- sona sono sons soof soon soos sosa soso soss ssaa ssab ssan ssao ssas ssbn ssns sssa sssb sssf ssss