a-ha aaaa aaab aaac aaad aaah aaba aabb aabc aabd aabh aabt aaca aacb aacc aacd aach aact aada aadc aadt aaha aata aatc aatt abaa abab abac abad abat abb- abba abbb abbt abca abcb abcc abcd abch abct abda abha abta ac-t acaa acab acac acad acat acba acca accc accd acch acct acda acdb acdc acdt acha achh acht acta actc acth actt adaa adab adac adad adah adat adba adbc adcc adda addc addd adha adhd adta ahab ahac ahad ahah ahat ahha ahta at-t ataa atab atac atad atat atca atcc atch atdt atha atta baaa baad baah baat baba babb bac- baca bacc bach bact bada badb badd badh baha baht bata batc bath batt bbad bbbb bbch bbdd bcaa bcat bcbc bcca bccc bcda bchd bctc bdbc bddc bddh bhat bhca bhcc btaa btcc btdt bttb c-cd caaa caab caac caah caat caba cac- caca cacc cach cada cadc cadd caha caht cat- cata catb catc catd cath catt cbac cbat cbbc cbca cbcc cbct cbdb cbdc cbha cbta cbtc ccaa ccab ccac ccad ccat ccba ccbc ccca cccb cccc ccdc ccdh ccha cctb cctc cctt cdaa cdac cdad cdba cdda cddb chaa chab chac chad chah chat chca chch chha chtt ctab ctba ctca ctta daab daad daba dabb dabt daca dact dada daha data datt dbcc dbtt dcbc dcca dccb dccc dcct dcdb dctc dddd dhaa dhad dhat dtaa dtac dtcc dthd haab haad haat haba habt hada hadh haha haht hata hatb hath hatt hbcd hcat hcbc hcca hccb hccc hcch hdca hdda hdtt hhaa hhat hhhh htab htcc taa- taat taba tabb tabc taca tacc tach tact tada taha tata tatb tath tatt tbca tbcb tbcc tbcd tbta tcad tcca tccc tcdd tch- tcha tchh tctc tdac tddb thaa thad that thca thch thtb ttab ttbb tttt