a-do aaaa aaab aaac aaad aaal aaba aabb aabc aabd aabl aaca aacb aacc aacd aacl aaco aacu aada aadc aadu aala aalc aald aall aalo aalu aaoo abaa abab abac abad abal abau abb- abba abbb abbo abca abcb abcc abcd abcl abda abdo abdu abla ablo aboa abob abod abol aboo abou abua abud abul acaa acab acac acad acba acbl acca accc accd acco accu acda acdb acdc acla aclc aclu acoa acod acol acou acu- acul acuo adaa adab adac adad adal adao adba adbc adcc adda addc addd addl addo addu adob adoc adod adoo adua adub alaa alac alad alal alao alau alb- alba albc albo albu alca alcc alco ald- alda aldl aldo all- alla alll allo allu aloa aloc alod alol aloo alou alua aoba aoca aola aoul auaa auca audc audo aul- aula auld aull aulo aulu auol baaa baad baal baba babb babo babu bac- baca bacc baco bada badb badd bado badu bala balc bald ball balo balu baol bau- baud baul bbad bbau bbbb bbdd bbdo bblb bcaa bcbc bcca bccc bccl bcda bcuc bdbc bddc blaa blab blac blad blau blcu bldc blob bloc blod bloo blou blub blud boab boac boad boal boba bobb bobo bobu boca boco bocu boda bodb bodo bodu bola bold boll bolo bolu boob booc bood bool boua boud boul buad bual buba bubb bubo bubu buca bucc buco bucu buda budb budd budl budo budu bula bulb buld bull bulu buol c-bo c-cd caaa caab caac caal caba cabo cabu cac- caca cacc caco cada cadc cadd cado cadu cala calc cald call calo calu caod caol cauc caul cauo cbac cbal cbbc cbca cbcc cbcl cbcu cbdb cbdc cbdo cblb cblc cbol ccaa ccab ccac ccad ccba ccbc ccca cccb cccc cccl cccu ccdc ccla cclc ccob ccoc ccod ccuc cdaa cdac cdad cdba cdda cddb cddl clab clad clau clcd cldc clob clod cloo clou club clud coad coal coba cobb cobo cobu coca coco cocu coda codd codl col- cola colb cold coll colo colu coob cood cool coua coub coud coul cuau cub- cuba cubb cuca cucc cuda cula culb culc culd cull culo d-bo daab daad daal daau daba dabb dabo dabu daca dada dado dadu dala dall dalo dalu daou daub daud dbcc dcbc dcca dccb dccc dccl dccu dcdb dddd ddlc ddoc ddub dlab dlbd dlco doab doal doba dobb dobl dobu doca doco docu dod- doda dodd dodo dola dold doll dolo dolu doob dood dool doub douc doud doul duaa duab duad dual dub- duba dubb dubc dubu duca duco duda dudd dudo dudu dula dulc dull dulo dulu duo- duul laaa laac laad laal laba labo labu laca lacc lacl laco lacu lada ladd lado ladu lala lald lall lalo lalu laou laub laud laul lbcc lcac lcad lcbc lcca lccc lcdd llao llcc lldb lldc lllc llll lloa lloc llod lloo llud loac load lob- loba lobb lobo loca locc loco locu loda lola lold loll lolo loob looc lood lool loud loul louu luau luba luca luda ludd ludo lula lull lulu luua oaau oall obad obal obba obbo obla oblu obol ocab ocac ocad ocal ocbc occa occc oclc ocul odac odal odbo odda oddd odla odoo odou olac olba olbo olca olcc oldb olla ollo ooaa ooba ooda oola oold oolo oooo ouac ouad oucc oudc oula ould oulu ouu- uabc uaca uald uaoc uaua ubac ubal ubba ubbo ubla ublo uboc ubod ubud ucad ucal ucbc ucca ucdc ucdd ucla ucua udaa udad udal udau udbc udca udoo ulaa ulad ulbc ulcc ulco ulla ullo ulo- uloc ulua ulul uocc uolc uulu uuoc uuuu