bbbb bbci bbin bbrc bcbc bccc bcci bcit bcnu bcru bctc bcuc bibb bibi bicc bici biin bin- binc bini binn bint binu birb biri birn birr birt biru bitc bitt bitu bnib bnin bnrr brcb bric brin brit brrr brtc bruc brun brut btcc btrc btrt bttb bubb bubi bubu bucc buci bucu buic buin buir buit buiu bunb buni bunn bunt bunu bur- burb buri burn burr burt buru but- buti butt cbbc cbcc cbcn cbcr cbct cbcu cbir cbit cbrn cbrt cbtc ccbc ccbn cccb cccc ccci cccu ccic ccii ccir ccnb ccnc ccni ccnr ccnu ccrc ccri ccrt cctb cctc cctt ccuc ccut cibc cibi cicc cici cicr cict cicu ciii ciit cin- cinc cini cint cirb circ ciri cirr cirt citb citi citt citu ciuc cnbc cnci cnib cnic cnrc cnrr cnrt cntc cntr cnut crbc crbu crcc crcr crib cric crin crit criu crrt crtc crub crun crut ctbi ctic ctrc ctrn cttn cub- cubb cubi cucc cuci cucn cui- cuin cuir cuit cunt curb curi curn curr curt cut- cutc cutt ibrc ibri ibtb ibtc icbc iccb iccc icci iccn iccr icct iccu icnb icnc icrc icrr icrt icru icub iiii iiit iirc iitr iitt iiuc incb inci incr init inni innr innu inri inti intn intr intu inui inun ircc ircu iri- iric irin irrc irri irti irun itic itin itri itur iucc iuiu n-ii nbbc nbcc nbci nbic nbti ncbc ncbi nccc ncci nccn nccr ncct nccu ncit ncnc ncrc ncri nctc nctr nibi nicc nici nicu niir niit niiu nini nirt niru nitb nitc niti nitr niur nnit nnnn nntn nric nrrc ntbc ntcc ntnu ntrc ntru nttr ntuc ntui nubc nubi nuci nucu nuin nuit nunc nunn nunt nurc nuri nurn nurr nurt nuru nutt nutu rbbb rbbr rcbc rccb rccc rcic rcnr rctc rcti rib- ribu ricc rict riin rinn riri riti ritt ritu rnbr rnin rnnt rnut rrrr rrun rtcc rubb rubi rubu ruci ruct ruin ruit runc runi runn runt rurc ruri ruru ruti rutt rutu ruun tbcb tbcc tbit tbrb tccc tccu tcnn tctc tibi tibu ticc tiit tiiu tinc tini tinn tint tinu tirb tiri tirr tiru titc titi titt titu tnbc tncc tnut trcc tri- trib tric trin trit trtc trtr trub truc trun trut truu ttbb ttcn tttt tubb tubr tubu tucc tuin tuit tuiu tunb tunc tuni tunn tunu turb turc turi turn turr turt turu tuti tutt tutu ubbi ubic ubii ubir ubit ucbc ucci ucin ucrc ucut uint uirr uncc unci unct uni- unic unii unin unir unit unni untb unut urbi urci urib uric urin uriu urni urri urun urur urut utin utri utti uttu uuni uuri uuuu