a-be a-ha aaaa aaab aaac aaae aaaf aaah aaal aaba aabb aabc aabh aabl aaca aacb aacc aace aacf aach aacl aaea aaec aafa aafb aafc aaff aafl aaha aahl aala aalc aale aall abaa abab abac abae abaf abal abb- abba abbb abbe abca abcb abcc abcf abch abcl abec abee abel abff abha abla able acaa acab acac acae acba acbl acca accc acce accf acch ace- acea acec aceh acel acfc acfe acfl acha ache achh achl acla aclc acle aeac aeaf aecb aecl aela aelc afaa afca afcb afcc afch afee afel affa affc afla aflc afle ahab ahac ahah ahal ahel ahfa ahha ahla ahle alaa alac alae alal alb- alba albc albe alca alcc alce alea alec alee alef aleh alfa alfe alha all- alla alle allh alll baaa baaf baah baal baba babb babe bac- baca bacc bace bach bael bafc baff baha bahl bala balc bale balf ball bbbb bbch bbeb bbfc bblb bcaa bcbc bcca bccc bccl bcec bcfc bche beaf beah beal beba bebb bebe beca bech beeb beef beel befa befe beff bela bele bell bfca bffl bhca bhcc bhel bhff blaa blab blac blae blah blea bleb blee bleh blfc caaa caab caac caaf caah caal caba cabe cabf cac- caca cacc cace cach caec cafa cafb cafc cafe caff cafl caha cahe cahl cala calc cale calf call cbac cbal cbbc cbca cbcc cbce cbcl cbea cbec cbee cbef cbfb cbfc cbha cbhl cblb cblc ccaa ccab ccac ccaf ccba ccbc ccca cccb cccc cccf cccl ccee ccel ccfa ccfc ccff ccfl ccha cche cchl ccla cclc ceac ceal ceba cec- ceca cece ceeb ceec ceel cef- cefa cefc cehl cel- cela celc cele celf cell cfaa cfab cfac cfae cfbc cfca cfcb cfcf cfcl cffb chaa chab chac chae chaf chah chal chca chce chch chea cheb chec chee chef cheh chel chfa chfc chha chlc clab claf clea clec clee clef e-cl e-la eaaf eaba eabh eaca eacc each eaec eafb eala ealc eale ebac ebal ebba ebbc ebcc ebel ebfc ebla ecaa ecac ecal ecbc ecbe ecca eccb eccc ecce eccl ecef ecfa ecfc echa eche echl ecla eeca eeea eeee eefa eefe eefl eele efab efca effa efla ehaa ehcc ehea eheh ehel ehle el-b elab elac elah elal elba elbe elca elcb elce elch elea elec elee elef eleh elfa elfc elfe ella elle faaa faac faah faba fabe faca facc face fach faeb fafa fafc fafe faff faha fala falc fale fall fbla fble fcab fcal fcba fcca fccf fcch feaf feal feba fece fech feeb feel fefc fefe feff fehl fela fele felf fell ffcc ffee ffff fhlb flab flac flae flcl flea flee haab haaf haal haba habe hace haec hafb hafe haff haha hal- hala halb hale half hall hbfc hcbc hcca hccb hccc hcch hcfa hcfc heaf heah heal hebb hebe heca hech heeb heef heel hefe hehe hela hele helf hell hfba hfce hhaa hhcl hhhh hhla hlah laaa laac laal laba labe laca lacc lace lach lacl lael lafb lafc lafe laff laha lahe lala lale lall lbcc lcac lcbc lcca lccc lcce lcfc lchc leaa leaf leah leal leba leca lece lech leea leef leel lefa lefe leff lehe lela lele lell lfca lfcc lfhe lhec lhee lhhh llcc llef lllc llll