a-ha aaaa aaab aaac aaad aaah aaal aaba aabb aabc aabd aabh aabl aaca aacb aacc aacd aach aacl aada aadc aaha aahl aala aalc aald aall abaa abab abac abad abal abb- abba abbb abca abcb abcc abcd abch abcl abda abha abla acaa acab acac acad acba acbl acca accc accd acch acda acdb acdc acha achh achl acla aclc adaa adab adac adad adah adal adba adbc adcc adda addc addd addl adha adhd ahab ahac ahad ahah ahal ahdl ahha ahla alaa alac alad alal alb- alba albc alca alcc ald- alda aldl alha all- alla allh alll baaa baad baah baal baba babb bac- baca bacc bach bada badb badd badh baha bahl bala balc bald ball bbad bbbb bbch bbdd bblb bcaa bcbc bcca bccc bccl bcda bchd bdbc bddc bddh bhca bhcc bhdl blaa blab blac blad blah bldc c-cd caaa caab caac caah caal caba cac- caca cacc cach cada cadc cadd caha cahl cala calc cald call cbac cbal cbbc cbca cbcc cbcl cbdb cbdc cbha cbhl cblb cblc ccaa ccab ccac ccad ccba ccbc ccca cccb cccc cccl ccdc ccdh ccha cchl ccla cclc cdaa cdac cdad cdba cdda cddb cddl chaa chab chac chad chah chal chca chch chha chlc clab clad clcd cldc daab daad daal daba dabb daca dada daha dahl dala dall dbcc dcbc dcca dccb dccc dccl dcdb dddd ddlc dhaa dhad dhal dlab dlbd dlha haab haad haal haba hada hadh hadl haha hal- hala halb hald hall hbcd hcbc hcca hccb hccc hcch hdca hdda hhaa hhcl hhhh hhla hlah laaa laac laad laal laba laca lacc lach lacl lada ladd laha lala lald lall lbcc lcac lcad lcbc lcca lccc lcdd lchc ldha lhhh llcc lldb lldc lllc llll