a-ak a-ha aaaa aaab aaac aaaf aaah aaal aaba aabb aabc aabh aabl aaca aacb aacc aacf aach aack aacl aafa aafb aafc aaff aafl aaha aahk aahl aaka aala aalc aall abaa abab abac abaf abak abal abb- abba abbb abca abcb abcc abcf abch abcl abff abha abla acaa acab acac acba acbl acca accc accf acch acfc acfl acha achh achl acla aclc afaa afak afca afcb afcc afch affa affc afka afla aflc ahab ahac ahah ahal ahfa ahha ahla akaa akah akal akca akha akka alaa alac alak alal alb- alba albc alca alcc alfa alha alk- alka alkb all- alla allh alll baaa baaf baah baak baal baba babb bac- baca bacc bach back bafc baff baha bahl bak- baka bakh bakl bala balc balf balk ball bbbb bbch bbfc bblb bcaa bcbc bcca bccc bccl bcfc bfca bffl bhca bhcc bhff blaa blab blac blah blak blfc blkb caaa caab caac caaf caah caal caba cabf cac- caca cacc cach cack cafa cafb cafc caff cafl caha cahl caka cala calc calf calk call cbac cbal cbbc cbca cbcc cbcl cbfb cbfc cbha cbhl cbka cbkl cblb cblc ccaa ccab ccac ccaf ccba ccbc ccca cccb cccc cccf cccl ccfa ccfc ccff ccfl ccha cchl ccla cclc cfaa cfab cfac cfbc cfca cfcb cfcf cfcl cffb cfhk chaa chab chac chaf chah chak chal chca chch chfa chfc chha chka chkb chlc ckac ckbc ckch ckck ckcl cklf clab claf f--k faaa faac faah faba faca facc fach fack fafa fafc faff faha fakh fala falc falk fall fbla fcab fcal fcba fcca fccf fcch ffcc ffff fhlb fkab flab flac flak flcl haab haaf haak haal haba hack hafb haff haha haka hakk hal- hala halb half halk hall hbfc hcbc hcca hccb hccc hcch hcfa hcfc hfba hhaa hhcl hhhh hhla hkcc hkcl hkfa hlah kaaa kaab kaaf kaak kaal kaba kabb kabc kabf kacb kacc kach kacl kafa kafc kaff kaha kahc kahl kaka kakc kakh kakk kala kalb kalc kalf kalk kall kbaa kbab kbac kbak kbal kbba kbbb kbbc kbbf kbbk kbbl kbca kbcb kbch kbck kbcl kbfb kbfc kbff kbfk kbfl kbhb kbhc kbhh kbhl kbkb kbkf kbkk kbkl kbla kblb kblf kbll kcaa kcab kcac kcah kcal kcba kcbc kcbf kcbk kcbl kcca kccb kccc kcck kccl kcfa kcfb kcfc kcfh kcfl kcha kchf kchh kchk kchl kckc kckf kckk kckl kcla kclc kclf kclh kclk kcll kfab kfac kfal kfbc kfbk kfcf kfch kffa kffb kfff kffk kfhc kfhl kfka kfkb kfla kflb kflc kflf kfll khab khac khaf khak khal khbc khca khcb khcc khcf khch khck khhk khhl khka khkk khla khlc khll kkaa kkac kkal kkba kkbb kkbl kkcb kkch kkck kkcl kkha kkhb kkhh kkhk kkkk kklb kklc kklf kklh kkll klaa klab klac klaf klak klal klbb klbc klbf klbl klca klcb klcc klch klck klcl klfa klfc klff klfh klhb klhc klka klkc klkk klkl klla kllb kllc kllk laaa laac laak laal laba laca lacc lach lack lacl lafb lafc laff laha laka lakh lala lall lbcc lcac lcbc lcca lccc lcfc lchc lfca lfcc lhhh lkab lkal llcc lllc llll