a-ha aaaa aaab aaac aaah aaar aaas aaba aabb aabc aabh aaca aacb aacc aach aacr aacs aaha aahs aara aarc aars aasa aasc aass abaa abab abac abar abas abb- abba abbb abbr abbs abca abcb abcc abch abcr abcs abha abhr abhs abra abrc abrs abs- absa abss acaa acab acac acar acas acba acca accc acch accs acha achh achr achs acr- acra acrc acrr acrs acsa acsc acss ahab ahac ahah ahar ahas ahha ahhs ahra ahrc ahrr ahrs ahsa ahss arab arac arah arar aras arba arbh arbs arc- arca arch arcs arh- arhs arr- arra arrc arrh arrr arrs ars- arsa arsc asaa asab asac asah asar asas asba asc- asca ascb ascc asch ascr asha ashs asra asrc asrs assa assc assh assr asss baaa baah baar baas baba babb babr babs bac- baca bacc bach bacs baha bahr bahs bar- bara barb barc barh barr bars basa basc bash bass bbas bbbb bbbs bbch bbhs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bchs bcra bcrs bcsa bcsc bcss bhar bhca bhcc bhhs bhra brab brac brah bras brca brcb brhs brrr brrs brsb brsr bsaa bsac bsas bscs bshs bsra bssc caaa caab caac caah caas caba cabs cac- caca cacc cach cacr caha cahs cara carb carc carr cars casa casb casc cash 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 ccra ccrc ccrs ccsa ccss chaa chab chac chah char chas chca chch chcs chha chhs chra chrb chrc chrr chrs chsc chsh chsr crab crac crar cras crbc crca crcc crcr crhs crsa crss csaa csab csac csar csas cscb cscc csch cscr cscs cshs csra csrc csrs cssa cssr haab haar haas haba habs hacs haha hahs hara harc harh harr hars hasa hasc hash hass hbar hbbs hbhs hbrs hbss hcbc hcbs hcca hccb hccc hcch hccs hchs hcsa hcsc hcss hhaa hhhh hhhs hrac hras hrhs hrrc hsac hsas hsbc hscc hshs raab raas raba rabb rabs rac- raca racc rach racs raha rahr rahs rara rarb rars rasa rasc rash rass rbbb rbbr rbbs rbhs rbss rcac rcas rcbc rccb rccc rccs rchb rchs rcsa rcsc rcss rhhs rrah rras rrhs rrrr rsaa rscc rsch rscs rshs rssa sa-c saab saac saah saar saas saba sabb sabc sabr sabs saca sacc sacr sacs saha sahr sahs sara sarc sarh sarr sars sasa sasc sash sass sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbhc sbhs sbsa scaa scab scac scar scas scba sccc sccs sch- scha schh schr schs scr- scra scrc scrs scsa scsc scsh scsr shab shac shah shar shas shbs shca shcc shha shhh shhs shrs shsc sras srbc srcc srch srhs ssaa ssab ssac ssas ssbr ssca sscc sscs sshs ssra ssrc ssrs sssa sssb sssc sssh ssss