a-ha aaaa aaab aaac aaah aaar aaba aabb aabc aabh aabt aaca aacb aacc aach aacr aact aaha aara aarc aart aata aatc aatt abaa abab abac abar abat abb- abba abbb abbr abbt abca abcb abcc abch abcr abct abha abhr abra abrc abta ac-t acaa acab acac acar acat acba acca accc acch acct acha achh achr acht acr- acra acrc acrr acta actc acth actt ahab ahac ahah ahar ahat ahha ahra ahrc ahrr ahta arab arac arah arar arat arba arbh arc- arca arch arct arh- arr- arra arrc arrh arrr arrt arta artc arth artr at-t ataa atab atac atar atat atca atcc atch atcr atha atra atrc atta attr baaa baah baar baat baba babb babr bac- baca bacc bach bact baha bahr baht bar- bara barb barc barh barr bart bata batc bath batt bbbb bbch bbrc bcaa bcar bcat bcbc bcca bccc bcra bctc bhar bhat bhca bhcc bhra bhrt brab brac brah brat brca brcb brrr brtc btaa btcc btrc btrt bttb caaa caab caac caah caat caba cac- caca cacc cach cacr caha caht cara carb carc carr cart cat- cata catb catc cath catt cbac cbar cbat cbbc cbca cbcc cbcr cbct cbha cbrh cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc ccha cchr ccra ccrc ccrt cctb cctc cctt chaa chab chac chah char chat chca chch chha chra chrb chrc chrr chrt chtr chtt crab crac crar crat crbc crca crcc crcr crrt crtc ctab ctba ctca ctrc ctta haab haar haat haba habt haha haht hara harc harh harr hart hata hatb hath hatt hbar hcat hcbc hcca hccb hccc hcch hhaa hhat hhhh hrac hrrc hrta hrtb htab htcc htra httr raab raat raba rabb rac- raca racc rach ract raha rahr raht rara rarb rata rath ratt rbbb rbbr rcac rcbc rccb rccc rchb rctc rrah rrat rrrr rtca rtcc taa- taar taat taba tabb tabc taca tacc tach tact taha tahr tara tarb tarc tarr tart tata tatb tath tatr tatt tbar tbca tbcb tbcc tbrb tbta tcca tccc tch- tcha tchh tchr tctc thaa thar that thca thch thra thtb thtr traa trab trac trat trca trcc trra trtc trtr ttab ttbb tttt