a-ha aaaa aaab aaac aaah aaal aaar aaba aabb aabc aabh aabl aaca aacb aacc aach aacl aacr aaha aahl aala aalc aall aara aarc abaa abab abac abal abar abb- abba abbb abbr abca abcb abcc abch abcl abcr abha abhr abla abra abrc acaa acab acac acar acba acbl acca accc acch acha achh achl achr acla aclc aclr acr- acra acrc acrr ahab ahac ahah ahal ahar ahha ahla ahra ahrc ahrr alaa alac alal alar alb- alba albc alca alcc alha all- alla allh alll allr arab arac arah aral arar arba arbh arc- arca arch arh- arla arr- arra arrc arrh arrr baaa baah baal baar baba babb babr bac- baca bacc bach baha bahl bahr bala balc ball bar- bara barb barc barh barr bbbb bbch bblb bbrc bcaa bcar bcbc bcca bccc bccl bcra bhar bhca bhcc bhra blaa blab blac blah blrc brab brac brah brca brcb brrr caaa caab caac caah caal caba cac- caca cacc cach cacr caha cahl cala calc call cara carb carc carl carr cbac cbal cbar cbbc cbca cbcc cbcl cbcr cbha cbhl cblb cblc cbrh cbrl ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl ccha cchl cchr ccla cclc ccra ccrc ccrl chaa chab chac chah chal char chca chch chha chlc chlr chra chrb chrc chrr clab clar clra crab crac crar crbc crca crcc crcr haab haal haar haba haha hal- hala halb hall hara harc harh harl harr hbar hcbc hcca hccb hccc hcch hhaa hhcl hhhh hhla hlah hrac hrbl hrrc laaa laac laal laar laba labr laca lacc lach lacl laha lahr lala lall lara larb larc larr lbar lbcc lblr lcac lcbc lcca lccc lchc lchr lcra lcrl lhhh llcc lllc llll lrac lral lrba lrrc lrrr raab raba rabb rabl rac- raca racc rach raha rahl rahr rala ralb rall rara rarb rbbb rbbr rbcl rcac rcbc rccb rccc rchb rlab rrah rrrr