a-do aaaa aaab aaad aaas aaba aabb aabd aabt aada aads aadt aaoo aasa aasd aass aast aata aatt abaa abab abad abas abat abb- abba abbb abbo abbs abbt abda abdo aboa abob abod aboo abos abot abs- absa absd abss abta abts adaa adab adad adao adas adat adba adda addd addo adds adob adod adoo ados adot adsa adso adss adst adta adts aoba aosd aoss aotd asaa asab asad asao asas asat asba asbo asda asdo asds asob asod asos asot assa assd asso asss asst asta astb asto asts at-t ataa atab atad atas atat atbs atdt atob atod atos atot atsb atst atta atto atts baaa baad baas baat baba babb babo babs bada badb badd bado bads baos basa baso bass bast bata bato bats batt bbad bbas bbbb bbbs bbdd bbdo bdos bdsd boab boad boas boat boba bobb bobo bobs boda bodb bodo bods boob bood boos boot bosa boso boss bost bota botb botd boto bots bott bsaa bsas bsat bsbd bsod bsos bssd bsts btaa btdt btob btss bttb d-bo daab daad daas daba dabb dabo dabs dabt dada dado dads daos dasa dasb dasd dass dast data dato dats datt dbas dbos dbsa dbss dbtt dddd ddot ddss ddts doab doas doat doba dobb dobs dod- doda dodd dodo dods doob dood doos doot dosa doso doss dost dota dotd doto dots dott dsba dsda dsoa dsos dssa dsst dsto dsts dtaa dtot dtss oass oast oats obad obas obba obbo obdt obos obot obsd obss obst obtd obts odas odbo odda oddd odds odoo odos odot odso odts ooaa ooba ooda oooo ooos oosa oost ootb oots osas osat osba osoo osos ossa ossb ossd osso osta osts otas otbd otbs oto- otoo otos otsa otso otta otto otts s-os saab saad saas saat saba sabb sabo sabs sada sadb sadd sado sads sadt saos sasa sasd saso sass sast sata satb satd sato sats satt sbaa sbas sbbs sbds sbot sbsa sbsd sbst sdba sdds sdot sdss soad soas soat soba sobo sobs sobt soda sodd sodo sods sood soos soot sosa soso soss sost sota soto sots ssaa ssab ssao ssas ssat ssdd ssot sssa sssb ssss ssta sstb sstd ssts stab stad stas stat stbd stbs stds stoa stob stod stoo stos stot stss sttd taa- taas taat taba tabb tabo tabs tada tado tads taoa taos tasa tasb tass tast tata tatb tato tats tatt tbas tbbs tbst tbta tddb tdss toab toad toas toat toba tobo tobs tobt toda todd todo tods todt tooa tood toos toot tosa tosb toso toss tost tota totd toto tots tott tsaa tsao tsat tsbd tsdb tsob tsos tssa tsst tsts ttab ttbb ttss tttt