a-ak a-ha aaaa aaab aaac aaad aaah aaal aaba aabb aabc aabd aabh aabl aaca aacb aacc aacd aach aack aacl aada aadc aaha aahk aahl aaka aala aalc aald aall abaa abab abac abad abak 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 ackd acla aclc adaa adab adac adad adah adak adal adba adbc adcc adda addc addd addl adha adhd ahab ahac ahad ahah ahal ahdl ahha ahla akaa akah akal akca akha akka alaa alac alad alak alal alb- alba albc alca alcc ald- alda aldl alha alk- alka alkb alkd all- alla allh alll baaa baad baah baak baal baba babb bac- baca bacc bach back bada badb badd badh baha bahl bak- baka bakh bakl bala balc bald balk ball bbad bbbb bbch bbdd bblb bcaa bcbc bcca bccc bccl bcda bchd bdbc bddc bddh bhca bhcc bhdl blaa blab blac blad blah blak bldc blkb blkd c-cd caaa caab caac caah caal caba cac- caca cacc cach cack cada cadc cadd caha cahl caka cala calc cald calk call cbac cbal cbbc cbca cbcc cbcl cbdb cbdc cbha cbhl cbka cbkl 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 chak chal chca chch chha chka chkb chlc ckac ckbc ckch ckck ckcl clab clad clcd cldc daab daad daal daba dabb daca dada daha dahl daka dala dalk dall dbcc dcbc dcca dccb dccc dccl dcdb dddd ddlc dhaa dhad dhak dhal dkba dkdc dlab dlbd dlha haab haad haak haal haba hack hada hadh hadl haha haka hakk hal- hala halb hald halk hall hbcd hcbc hcca hccb hccc hcch hdbk hdca hdda hhaa hhcl hhhh hhla hkcc hkcl hkdl hlah kaaa kaab kaak kaal kaba kabb kabc kabd kacb kacc kacd kach kacl kad- kada kadd kadl kaha kahc kahl kaka kakc kakh kakk kala kalb kalc kald kalk kall kbaa kbab kbac kbad kbak kbal kbba kbbb kbbc kbbd kbbk kbbl kbca kbcb kbch kbck kbcl kbdb kbdl kbhb kbhc kbhh kbhl kbkb kbkk kbkl kbla kblb kbld kbll kcaa kcab kcac kcad kcah kcal kcba kcbc kcbd kcbk kcbl kcca kccb kccc kccd kcck kccl kcda kcdc kcdd kcha kchh kchk kchl kckc kckk kckl kcla kclc kclh kclk kcll kdaa kdab kdac kdad kdak kdal kdbb kdbl kdca kdcc kdcd kddb kddc kddd kddk kddl kdhl kdka kdkb kdkd kdkk kdla kdlb kdlc kdld kdlh kdll khab khac khad khak khal khbc khbd khca khcb khcc khch khck khdc khdk khhk khhl khka khkk khla khlc khll kkaa kkac kkal kkba kkbb kkbd kkbl kkcb kkcd kkch kkck kkcl kkda kkdc kkdd kkdl kkha kkhb kkhh kkhk kkkk kklb kklc kkld kklh kkll klaa klab klac klad klak klal klbb klbc klbd klbl klca klcb klcc klcd klch klck klcl kldc kldd klhb klhc klka klkc klkk klkl klla kllb kllc kllk laaa laac laad laak laal laba laca lacc lach lack lacl lada ladd laha laka lakh lala lald lall lbcc lcac lcad lcbc lcca lccc lcdd lchc ldha lhhh lkab lkal llcc lldb lldc lllc llll