a-a a-b a-c aaa aab aac aah aao aar aas ab- aba abb abc abh abo abr abs ac- aca acb acc ach aco acr acs aha ahb ahc ahh aho ahr ahs aoa aob aoc aoh aoo aor aos ar- ara arb arc arh aro arr ars as- asa asb asc ash aso asr ass baa bab bac bah bao bar bas bba bbb bbc bbh bbo bbr bbs bca bcb bcc bch bco bcr bcs bha bhb bhc bhh bho bhr bhs boa bob boc boh boo bor bos bra brb brh bro brr brs bsa bsb bsc bsh bso bsr bss c-- caa cab cac cah cao car cas cba cbb cbc cbh cbo cbr cbs cca ccb ccc cch cco ccr ccs ch- cha chb chc chh cho chr chs co- coa cob coc coh coo cor cos cra crb crc crh cro crr crs csa csb csc csh cso csr css haa hab hac hah hao har has hba hbb hbc hbh hbo hbr hbs hca hcb hcc hch hco hcr hcs hha hhb hhc hhh hho hhr hhs hoa hob hoc hoh hoo hor hos hr- hra hrb hrc hrh hro hrr hrs hsa hsb hsc hsh hsr hss oaa oab oac oah oao oar oas ob- oba obb obc obh obo obr obs oc- oca ocb occ och oco ocr ocs oha ohc ohh oho ohr ohs oo- ooa oob ooc ooh ooo oor oos or- ora orb orc orh oro orr ors os- osa osb osc osh oso osr oss ra- raa rab rac rah rao rar ras rba rbb rbc rbh rbo rbr rbs rca rcb rcc rch rco rcr rcs rh- rha rhb rhc rhh rho rhr rhs roa rob roc roh roo ror ros rra rrb rrc rrh rrr rrs rsa rsb rsc rsh rso rsr rss saa sab sac sah sao sar sas sba sbb sbc sbh sbo sbr sbs sca scb scc sch sco scr scs sh- sha shb shc shh sho shr shs soa sob soc soh soo sor sos sr- sra srb src srh sro srr srs ss- ssa ssb ssc ssh sso ssr sss

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