a-do aaaa aaab aaad aaas aaba aabb aabd aada aads aaoo aasa aasd aass abaa abab abad abas abb- abba abbb abbo abbs abda abdo aboa abob abod aboo abos abs- absa absd abss adaa adab adad adao adas adba adda addd addo adds adob adod adoo ados adsa adso adss aoba aosd aoss asaa asab asad asao asas asba asbo asda asdo asds asob asod asos assa assd asso asss baaa baad baas baba babb babo babs bada badb badd bado bads baos basa baso bass bbad bbas bbbb bbbs bbdd bbdo bdos bdsd boab boad boas boba bobb bobo bobs boda bodb bodo bods boob bood boos bosa boso boss bsaa bsas bsbd bsod bsos bssd d-bo daab daad daas daba dabb dabo dabs dada dado dads daos dasa dasb dasd dass dbas dbos dbsa dbss dddd ddss doab doas doba dobb dobs dod- doda dodd dodo dods doob dood doos dosa doso doss dsba dsda dsoa dsos dssa oass obad obas obba obbo obos obsd obss odas odbo odda oddd odds odoo odos odso ooaa ooba ooda oooo ooos oosa osas osba osoo osos ossa ossb ossd osso s-os saab saad saas saba sabb sabo sabs sada sadb sadd sado sads saos sasa sasd saso sass sbaa sbas sbbs sbds sbsa sbsd sdba sdds sdss soad soas soba sobo sobs soda sodd sodo sods sood soos sosa soso soss ssaa ssab ssao ssas ssdd sssa sssb ssss