a-ak a-ha aaaa aaab aaac aaah aaal aaba aabb aabc aabh aabl aaca aacb aacc aach aack aacl aaha aahk aahl aaka aala aalc aall abaa abab abac abak abal abb- abba abbb abca abcb abcc abch abcl abha abla acaa acab acac acba acbl acca accc acch acha achh achl acla aclc ahab ahac ahah ahal ahha ahla akaa akah akal akca akha akka alaa alac alak alal alb- alba albc alca alcc alha alk- alka alkb all- alla allh alll baaa baah baak baal baba babb bac- baca bacc bach back baha bahl bak- baka bakh bakl bala balc balk ball bbbb bbch bblb bcaa bcbc bcca bccc bccl bhca bhcc blaa blab blac blah blak blkb caaa caab caac caah caal caba cac- caca cacc cach cack caha cahl caka cala calc calk call cbac cbal cbbc cbca cbcc cbcl cbha cbhl cbka cbkl cblb cblc ccaa ccab ccac ccba ccbc ccca cccb cccc cccl ccha cchl ccla cclc chaa chab chac chah chak chal chca chch chha chka chkb chlc ckac ckbc ckch ckck ckcl clab haab haak haal haba hack haha haka hakk hal- hala halb halk hall hcbc hcca hccb hccc hcch hhaa hhcl hhhh hhla hkcc hkcl hlah kaaa kaab kaak kaal kaba kabb kabc kacb kacc kach kacl kaha kahc kahl kaka kakc kakh kakk kala kalb kalc kalk kall kbaa kbab kbac kbak kbal kbba kbbb kbbc kbbk kbbl kbca kbcb kbch kbck kbcl kbhb kbhc kbhh kbhl kbkb kbkk kbkl kbla kblb kbll kcaa kcab kcac kcah kcal kcba kcbc kcbk kcbl kcca kccb kccc kcck kccl kcha kchh kchk kchl kckc kckk kckl kcla kclc kclh kclk kcll khab khac khak khal khbc khca khcb khcc 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 kklh kkll klaa klab klac klak klal klbb klbc klbl klca klcb klcc klch klck klcl klhb klhc klka klkc klkk klkl klla kllb kllc kllk laaa laac laak laal laba laca lacc lach lack lacl laha laka lakh lala lall lbcc lcac lcbc lcca lccc lchc lhhh lkab lkal llcc lllc llll