a-a a-b a-c aaa aab aac aao aar aas ab- aba abb abc abo abr abs ac- aca acb acc aco acr acs aoa aob aoc aoo aor aos ar- ara arb arc aro arr ars as- asa asb asc aso asr ass baa bab bac bao bar bas bba bbb bbc bbo bbr bbs bca bcb bcc bco bcr bcs boa bob boc boo bor bos bra brb bro brr brs bsa bsb bsc bso bsr bss c-- caa cab cac cao car cas cba cbb cbc cbo cbr cbs cca ccb ccc cco ccr ccs co- coa cob coc coo cor cos cra crb crc cro crr crs csa csb csc cso csr css oaa oab oac oao oar oas ob- oba obb obc obo obr obs oc- oca ocb occ oco ocr ocs oo- ooa oob ooc ooo oor oos or- ora orb orc oro orr ors os- osa osb osc oso osr oss ra- raa rab rac rao rar ras rba rbb rbc rbo rbr rbs rca rcb rcc rco rcr rcs roa rob roc roo ror ros rra rrb rrc rrr rrs rsa rsb rsc rso rsr rss saa sab sac sao sar sas sba sbb sbc sbo sbr sbs sca scb scc sco scr scs soa sob soc soo sor sos sr- sra srb src sro srr srs ss- ssa ssb ssc sso ssr sss

aaaa aaab aaac aaar aaas aaba aabb aabc aaca aacb aacc aaco aacr aacs aaoo aara aarc aaro aars aasa aasc aass abaa abab abac abar abas abb- abba abbb abbo abbr abbs abca abcb abcc abcr abcs aboa abob aboo abor abos abra abrc abro abrs abs- absa abss acaa acab acac acar acas acba acca accc acco accs acoa acor acos acr- acra acrc acro acrr acrs acsa acsc acss aoba aoca aocs aora aorb aors aoss arab arac arar aras arba arbs arc- arca arco arcs aroa arob aroo aror aros arr- arra arrc arro arrr arrs ars- arsa arsc arso asaa asab asac asao asar asas asba asbo asc- asca ascb ascc asco ascr asob asoc asor asos asra asrc asro asrs assa assc asso assr asss baaa baar baas baba babb babo babr babs bac- baca bacc baco bacs baos bar- bara barb barc baro barr bars basa basc baso bass bbas bbbb bbbs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcor bcos bcra bcrs bcsa bcsc bcss boab boac boar boas boba bobb bobo bobs boca boco bocs boob booc boor boos bor- bora boro borr bors bosa bosc boso boss brab brac brao bras brca brcb broa brob broc broo bror bros brrr brrs brsb brsr bsaa bsac bsas bscs bsos bsra bssc c-bo caaa caab caac caas caba cabo cabs cac- caca cacc caco cacr caor caos cara carb carc caro carr cars casa casb casc caso casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbsa cbsc ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccs ccob ccoc ccra ccrc ccrs ccsa ccss coas coba cobb cobo cobs coca coco coob coos cor- cora corb corc coro corr cors cosa cosc coso coss crab crac crar cras crbc crca crcc crcr crob croc croo cror crsa crss csaa csab csac csao csar csas cscb cscc csco cscr cscs csob csor csos csra csrc csrs cssa cssr oara oars oasc oass obas obba obbo obor obos obra obro obsr obss ocab ocac ocas ocbc occa occc ocos ocra ocro ocrr ocrs ocsa ooaa ooba oocr oooo ooos oora oosa orab orac orao orar oras orba orbb orbo orbs orca orco orcs oro- oror oros orra orro orrs orsa orso osar osas osba osca oscc osco osoo osor osos osro ossa ossb osso raab raas raba rabb rabo rabs rac- raca racc raco racs raob raoc raos rara rarb raro rars rasa rasc raso rass rbbb rbbr rbbs rbss rcac rcas rcbc rcbo rccb rccc rccs rcos rcsa rcsc rcss roab roar roas rob- roba robb robo robs roca rocc roco rocs roob roor roos rora rorc roro rosa rosc roso ross rras rrrr rsaa rscc rscs rsos rssa s-os sa-c saab saac saar saas saba sabb sabc sabo sabr sabs saca sacc saco sacr sacs saor saos sara sarc saro sarr sars sasa sasc saso sass sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbor sbsa scaa scab scac scar scas scba sccc sccs scob scoo scor scr- scra scrc scrs scsa scsc scso scsr soar soas soba sobo sobr sobs soca soco socr socs soor soos sora sorb soro sorr sors sosa soso soss sras srbc srcc sros ssaa ssab ssac ssao ssas ssbr ssca sscc sscs ssoc ssra ssrc ssrs sssa sssb sssc ssss

-aaa- aaaas aaaoc aaarc aaasa aaass aabaa aabba aabra aacbc aacos aacsa aacsb aacss aasra abaab ababa ababs abaca abaco abacs abara abasa abass abbac abbar abbas abbos abbrs abcas abccc aboab abobo abora aborc aboso abrac abrar abras absar acaca acacb acar- acara acars acass accas accra acoss acrab acro- acrob acros aoos ar-ab ara-c arab- araba arabo arabs araca araco arara arars arass arbab arbar arbas arbor arbos arcas arcoa arcor arcos aroab aroar aroba aroor aroos arora arosa arras arros arsac arsos asaba asabc asaco asara asaro asasa asbca asbos asbro ascao ascar asco- asoar asocs asors asosa asrar asroc asror assab assac assas assoa assoc assos b-cas baars babar babas babbs baboo babos babra bacab bacao bacar bacas bacca bacco bacos baoro baraa barab barac barao barar baras barba barbs barca barco barcs baro- baroa baroo baror baros barra barro barrs barsa barss basab basar basca basco baso- basor basra bassa basso bbsrc bo-bo boaco boaro boars bobac bobar boboc bobos bobr bocac bocao bocar bocas bocca bocoa bocor bocsa booba boobs booco boora boors boosa borac boras borba borbo borca borcs boro- boroa boroo boros borra borro borsa bosas bosco boscs bosor bosra bossa bosso braas braca bracc braco bracs brasa brasc brass brobo brobs