bbbb bbci bbdd bbin bbrc bcbc bccc bcci bcnu bcru bcuc bd-r bdbc bddc bdii bdin bibb bibi bicc bici bidi bidr bidu biin bin- binc bind bini binn binu birb bird biri birn birr biru bnib bnin bnrr brcb bric brid brin brrr bruc brud brun bubb bubi bubu bucc buci bucu budb budd budi budu buic buid buin buir buiu bunb bund buni bunn bunu bur- burb burd buri burn burr buru c-cd cbbc cbcc cbcn cbcr cbcu cbdb cbdc cbdi cbdn cbid cbir cbnd cbrd cbrn ccbc ccbn cccb cccc ccci cccu ccdc ccdi ccdn ccdr ccic ccid ccii ccir ccnb ccnc ccni ccnr ccnu ccrc ccri ccuc cd-r cddb cddr cdic cdii cdnb cdnc cibc cibi cicc cici cicr cicu cidc cidi cidr ciid ciii cin- cinc cind cini cirb circ ciri cirr ciuc cnbc cnci cndd cnib cnic cnid cnrc cnrr crbc crbu crcc crcr crdc crib cric crin criu crub crud crun cub- cubb cubi cucc cuci cucn cudi cui- cuin cuir cund curb curd curi curn curr dbcc dbrn dcbc dccb dccc dcci dccu dcdb dcii dddd ddrc ddub dibb dici didi didu diii din- dinc dini dinn dinu dird dirr dnic dnrc drbc drib dric drin drub drui druu dub- dubb dubc dubu dudd dudu duid duin duir dunc dunn duri durn duru duur ibid ibrc ibrd ibri icbc icbd iccb iccc icci iccn iccr iccu icdc icdd icnb icnc icrc icrr icru icub idcr idic idid idin idir idrc idub idun iicd iiii iirc iiuc inbd incb incd inci incr ind- indc indi indu inid inni innr innu inri inui inun ircc ircd ircu irdc iri- iric irid irin irrc irri irun iucc iuiu n-ii nbbc nbcc nbci nbic ncbc ncbi nccc ncci nccn nccr nccu ncdc ncdn ncdr ncdu ncid ncnc ncnd ncrc ncri ndcc nddb ndic ndrc ndri nibi nicc nicd nici nicu nidd nidi niir niiu nind nini niru niur nndb nnnn nrdc nric nrrc nrrd nubc nubi nuci nucu nudc nudd nudi nuin nunc nunn nurc nurd nuri nurn nurr nuru rbbb rbbr rcbc rccb rccc rcdc rcic rcid rcnr rcrd rib- ribu ricc ridc ridd ridi riin rind rinn riri rnbr rndc rnin rrrr rrun rubb rubi rubu ruci rudd rudi ruid ruin runc rund runi runn rurc rurd ruri ruru ruud ruun ubbi ubic ubid ubii ubir ubud ucbc ucci ucdc ucdd ucin ucrc udbc uddi udic udid udin udir udun uirr unbd uncc unci undi uni- unic unii unin unir unni urbi urci urdu urib uric urin uriu urni urri urun urur uuni uuri uuuu