a-be a-do aaaa aaab aaac aaad aaae aaal aaba aabb aabc aabd aabl aaca aacb aacc aacd aace aacl aaco aada aadc aade aaea aaec aala aalc aald aale aall aalo aaoe aaoo abaa abab abac abad abae abal abb- abba abbb abbe abbo abca abcb abcc abcd abcl abda abdo abec abed abee abel abla able ablo aboa abob abod abol aboo acaa acab acac acad acae acba acbl acca accc accd acce acco acda acdb acdc acde ace- acea acec aced acel acla aclc acle acoa acod acoe acol adaa adab adac adad adae adal adao adba adbc adcc adda addc addd adde addl addo adea adeb adee adel adeo adle adob adoc adod adoe adoo aeac aecb aecl aede aela aelc alaa alac alad alae alal alao alb- alba albc albe albo alca alcc alce alco ald- alda alde aldl aldo alea alec aled alee aleo all- alla alle alll allo aloa aloc alod aloe alol aloo aoba aoca aoce aola aole baaa baad baal baba babb babe babo bac- baca bacc bace baco bada badb badd bade bado baed bael bala balc bald bale ball balo baol bbad bbbb bbdd bbdo bbeb bblb bcaa bcbc bcca bccc bccl bcda bcde bcec bdbc bddc bdle bead beal beba bebb bebe bebo beca beda bede bedl bedo beeb beed beel bela beld bele bell belo beo- beod blaa blab blac blad blae bldc blea bleb bled blee bleo blob bloc blod bloo boab boac boad boal boba bobb bobe bobo boca boce boco boda bodb bode bodo boea boec boee boel boeo bola bold bole boll bolo boob booc bood booe bool c-bo c-cd caaa caab caac caal caba cabe cabo cac- caca cacc cace caco cada cadc cadd cade cado caec cala calc cald cale call calo caod caol cbac cbal cbbc cbca cbcc cbce cbcl cbdb cbdc cbdo cbea cbec cbee cblb cblc cbol ccaa ccab ccac ccad ccba ccbc ccca cccb cccc cccl ccdc cced ccee ccel ccla cclc ccob ccoc ccod cd-e cdaa cdac cdad cdba cdda cddb cddl cdec ceac cead ceal ceba cec- ceca cece ceco ceda cedd cede cedo ceeb ceec ceel cel- cela celc cele cell celo ceol clab clad clcd cldc clea clec cled clee cleo clob clod cloe cloo coad coal coba cobb cobe cobo coca coce coco coda codd code codl coed coel col- cola colb cold cole coll colo coob cood cool d-bo daab daad daae daal daba dabb dabo daca dace dada dade dado daeb dala dale dall dalo dbcc dcbc dcca dccb dccc dccl dcdb dddd ddlc ddoc deac dead deae deal deba debe dec- deca decc decd dece decl deco deda dedd dede dedo deeb deed deel dela deld dele dell delo deol dlab dlbd dlco doab doae doal doba dobb dobe dobl doca doce doco dod- doda dodd dode dodo doea doel dola dold dole doll dolo doob dood dool e-cl e-la eaba eaca eacc eada eadb eadd eaec eala ealc eald eale ebac ebal ebba ebbc ebbo ebcc ebed ebel ebla eboe ebol eboo ecaa ecac ecad ecal ecao ecbc ecbe ecca eccb eccc ecce eccl ecco ecdc ecdl eced ecla eco- ecod ecol edac edad edca edda eddc edde eddo ede- edea edel edla edle edoc edod eeca eede eeea eeee eele eeoc el-b elab elac elad elal elba elbe elbo elca elcb elce elco elda elde elea elec eled elee eleo ella elle ello elod eocd eode eola eole eolo laaa laac laad laal laba labe labo laca lacc lace lacl laco lada ladd lade lado lael lala lald lale lall lalo lbcc lcac lcad lcbc lcca lccc lcce lcdd ldeo leaa lead leal leao leba lebd lebo leca lece leco leda lede ledo leea leed leel lela lele lell lelo leoc leod llao llcc lldb lldc lllc llll lloa lloc llod lloo loac load lob- loba lobb lobe lobo loca locc loce loco loda lode loeb lola lold lole loll lolo loob looc lood looe lool o-eo oade oall obad obal obba obbo obea obec obed obel obla oble oboe obol ocab ocac ocad ocal ocbc occa occc oce oced ocee oclc odac odal odbo odda oddd odea oded odel odeo odla odle odoo oec- oeca oecc oedo oeec oela oele olac olba olbo olca olcc oldb olde ole- olea oled oleo olla olle ollo ooaa ooba oobe ooda oola oold oolo oooo