a-ha aaaa aaab aaac aaah aaar aaas aaba aabb aabc aabh aaca aacb aacc aach aaco aacr aacs aaha aahs aaoo aara aarc aaro aars aasa aasc aass abaa abab abac abar abas abb- abba abbb abbo abbr abbs abca abcb abcc abch abcr abcs abha abho abhr abhs aboa abob aboh aboo abor abos abra abrc abro abrs abs- absa abss acaa acab acac acar acas acba acca accc acch acco accs acha achh acho achr achs acoa acoh acor acos acr- acra acrc acro acrr acrs acsa acsc acss ahab ahac ahah ahar ahas ahha ahhs ahoa ahor ahra ahrc ahrr ahrs ahsa ahso ahss aoah aoba aoca aocs aora aorb aors aoss arab arac arah arar aras arba arbh arbs arc- arca arch arco arcs arh- arhs aroa arob aroo aror aros arr- arra arrc arrh arro arrr arrs ars- arsa arsc arso asaa asab asac asah asao asar asas asba asbo asc- asca ascb ascc asch asco ascr asha ashs asob asoc asor asos asra asrc asro asrs assa assc assh asso assr asss baaa baah baar baas baba babb babo babr babs bac- baca bacc bach baco bacs baha baho bahr bahs baoh baos bar- bara barb barc barh baro barr bars basa basc bash baso bass bbas bbbb bbbs bbch bbhs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bchs bcor bcos bcra bcrs bcsa bcsc bcss bhao bhar bhca bhcc bhhs bhor bhra boab boac boar boas boba bobb bobo bobs boca boch boco bocs boha boho bohr bohs boob booc booh boor boos bor- bora borh boro borr bors bosa bosc bosh boso boss brab brac brah brao bras brca brcb brhs broa brob broc broh broo bror bros brrr brrs brsb brsr bsaa bsac bsas bscs bshs bsos bsra bssc c-bo caaa caab caac caah caas caba cabo cabs cac- caca cacc cach caco cacr caha cahs caor caos cara carb carc caro carr cars casa casb casc cash caso casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbha cbhs cbrh cbsa cbsc ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccs ccha cchr cchs ccob ccoc ccra ccrc ccrs ccsa ccss chaa chab chac chah chao char chas chca chch chcs chha chhs choc choh choo chor chos chra chrb chrc chro chrr chrs chsc chsh chsr coas coba cobb cobh cobo cobs coca coch coco coha coho cohs coob cooh coos cor- cora corb corc coro corr cors cosa cosc cosh coso coss crab crac crar cras crbc crca crcc crcr crhs crob croc croh croo cror crsa crss csaa csab csac csao csar csas cscb cscc csch csco cscr cscs cshs csob csor csos csra csrc csrs cssa cssr haab haar haas haba habo habs haco hacs haha haho hahs haor hara harc harh haro harr hars hasa hasc hash hass hbar hbbs hbhs hboc hbos hbrs hbss hcbc hcbs hcca hccb hccc hcch hccs hchs hcsa hcsc hcso hcss hhaa hhhh hhhs hoac hoar hoas hoba hobo hobs hoca hoch hocr hocs hoha hoho hoor hoos hora horc horo horr hors hosa hosh hoss hrac hras hrhs hrob hros hrrc hrso hsac hsas hsbc hscc hshs hsob oahs oara oars oasc oass obas obba obbo obhs obor obos obra obrh obro obsr obss ocab ocac ocas ocbc occa occc ocha ochs ocos ocra ocro ocrr ocrs ocsa ohba ohcc ohho ohhs ohob ohoh ohos ohra ohso ohss ooaa ooba oocr ooha ooho oohs oooh oooo ooos oora oosa orab orac orah orao orar oras orba orbb orbo orbs orca orch orco orcs orhs oro- oror oros orra orro orrs orsa orso osar osas osba osca oscc osco osha oshc osho oshs osoo osor osos osro ossa ossb osso raab raas raba rabb rabo rabs rac- raca racc rach raco racs raha rahr rahs raob raoc raoh raos rara rarb raro rars rasa rasc rash raso rass rbbb rbbr rbbs rbhs rboh rbss rcac rcas rcbc rcbo rccb rccc rccs rchb rchs rcos rcsa rcsc rcss rhhs rhoa rhob rhoc rhoh rhos roab roar roas rob- roba robb robo robs roca rocc roch roco rocs roha rohr rohs roob roor roos rora rorc roro rosa rosc rosh roso ross rrah rras rrhs rrrr rsaa rscc rsch rscs rshs rsos rssa s-os sa-c saab saac saah saar saas saba sabb sabc sabo sabr sabs saca sacc saco sacr sacs saha saho sahr sahs saor saos sara sarc sarh saro sarr sars sasa sasc sash saso sass sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbhc sbhs sbor sbsa scaa scab scac scar scas scba sccc sccs sch- scha schh scho schr schs scob scoh scoo scor scr- scra scrc scrs scsa scsc scsh scso scsr shab shac shah shao shar shas shbs shca shcc shha shhh shhs shoa shoo shor shos shrs shsc soar soas soba sobo sobr sobs soca soch soco socr socs soha sohh soho sohs soor soos sora sorb sorh soro sorr sors sosa sosh soso soss sras srbc srcc srch srhs sros ssaa ssab ssac ssao ssas ssbr ssca sscc sscs sshs ssoc ssra ssrc ssrs sssa sssb sssc sssh ssss