a-be aaaa aaab aaac aaae aaaf aaal aaba aabb aabc aabl aaca aacb aacc aace aacf aacl aaea aaec aafa aafb aafc aaff aafl aage aala aalc aale aall abaa abab abac abae abaf abag abal abb- abba abbb abbe abca abcb abcc abcf abcl abec abee abel abff abgl abla able acaa acab acac acae acag acba acbl acca accc acce accf ace- acea acec acel acfc acfe acfl acga acla aclc acle aeac aeaf aecb aecl aega aela aelc afaa afca afcb afcc afee afel affa affc afgf afla aflc afle aflg agac agag agal agba agca agcc agce agea agee agel agfa agga agge agla aglc agle alaa alac alae alag alal alb- alba albc albe alca alcc alce alea alec alee alef aleg alfa alfe alg- alga alge all- alla alle alll baaa baaf baal baba babb babe bac- baca bacc bace bael bafc baff baga bage bagg bala balc bale balf ball bbbb bbeb bbfc bbga bblb bcaa bcbc bcbg bcca bccc bccl bcec bcfc beaf beag beal beba bebb bebe beca beeb beef beeg beel befa befe beff bega begg bela bele belg bell bfca bffl bfgf bgca bgfc blaa blab blac blae blag blea bleb blee bleg blfc caaa caab caac caaf caal caba cabe cabf cabg cac- caca cacc cace caec cafa cafb cafc cafe caff cafl caga cage cagg cala calc cale calf call cbac cbal cbbc cbca cbcc cbce cbcl cbea cbec cbee cbef cbfb cbfc cbga cbgb cblb cblc ccaa ccab ccac ccaf ccag ccba ccbc ccca cccb cccc cccf cccl ccee ccel ccfa ccfc ccff ccfl ccga ccgc ccla cclc cclg ceac ceal ceba cec- ceca cece ceeb ceec ceel cef- cefa cefc cege cel- cela celc cele celf cell cfaa cfab cfac cfae cfbc cfca cfcb cfcf cfcl cffb cgac cgal cgcc cgcg cgel cgfc clab claf clag clea clec clee clef cleg e-cl e-la eaaf eaba eaca eacc eaec eafb eaga eage eagl eala ealc eale ebac ebal ebba ebbc ebcc ebel ebfc ebla ecaa ecac ecal ecbc ecbe ecca eccb eccc ecce eccl ecef ecfa ecfc ecla eeca eeea eeee eefa eefe eefl eega eele ef-g efab efca effa efla egaa egae egal egba egbe egcc egcg egea egec egee egel eggb egge eglc egle el-b elab elac elal elba elbe elca elcb elce elea elec elee elef elfa elfc elfe elgg ella elle faaa faac faba fabe faca facc face faeb fafa fafc fafe faff fafg fage fagg fala falc fale fall fbla fble fcab fcal fcba fcca fccf feaf feal feba fece feeb feel fefc fefe feff fege fegg fela fele felf fell ffcc ffee ffff flab flac flae flag flcl flea flee fleg gaal gaba gabb gabe gabl gace gaea gaec gael gafa gafb gafc gaff gaga gage gagg gala gale gall gbag gbfc gc-c gcaa gcal gcbc gccc gccf gcfc gclc geab geal geba gebe geca gece geel gefe gege gegg gegl gela gelb gele gelf gelg gell gfcf gffa ggcl ggfg gggg glaa glab glbc glcc glce gleb glee gleg glfc glge laaa laac laag laal laba labe laca lacc lace lacl lael lafb lafc lafe laff lag- laga lage lagg lala lale lall lbcc lcac lcbc lcca lccc lcce lcfc lcfg leaa leaf leag leal leba leca lece leea leef leel lefa lefe leff lega lege legg lela lele lell lfca lfcc lgca lgfl llcc llef llgc lllc llll