bbbb bbci bbin bbrc bcbc bccc bcci bcnu bcru bcuc bibb bibi bicc bici biin bin- binc bini binn binu birb biri birn birr biru bnib bnin bnrr brcb bric brin brrr bruc brun bubb bubi bubu bucc buci bucu buic buin buir buiu bunb buni bunn bunu bur- burb buri burn burr buru cbbc cbcc cbcn cbcr cbcu cbir cbrn ccbc ccbn cccb cccc ccci cccu ccic ccii ccir ccnb ccnc ccni ccnr ccnu ccrc ccri ccuc cibc cibi cicc cici cicr cicu ciii cin- cinc cini cirb circ ciri cirr ciuc cnbc cnci cnib cnic cnrc cnrr crbc crbu crcc crcr crib cric crin criu crub crun cub- cubb cubi cucc cuci cucn cui- cuin cuir curb curi curn curr ibrc ibri icbc iccb iccc icci iccn iccr iccu icnb icnc icrc icrr icru icub iiii iirc iiuc incb inci incr inni innr innu inri inui inun ircc ircu iri- iric irin irrc irri irun iucc iuiu n-ii nbbc nbcc nbci nbic ncbc ncbi nccc ncci nccn nccr nccu ncnc ncrc ncri nibi nicc nici nicu niir niiu nini niru niur nnnn nric nrrc nubc nubi nuci nucu nuin nunc nunn nurc nuri nurn nurr nuru rbbb rbbr rcbc rccb rccc rcic rcnr rib- ribu ricc riin rinn riri rnbr rnin rrrr rrun rubb rubi rubu ruci ruin runc runi runn rurc ruri ruru ruun ubbi ubic ubii ubir ucbc ucci ucin ucrc uirr uncc unci uni- unic unii unin unir unni urbi urci urib uric urin uriu urni urri urun urur uuni uuri uuuu