bbbb bbci bbin bbrc bcbc bccc bcci bcor bibb bibi bibo bicc bici bico biin bin- binc bini binn bino bio- bioc bioi bion birb biri birn biro birr bnib bnin bnoc bnor bnrr bobb bobi bobo boco boi- boii boin bonc boni bonn bono boob booc boon boor bor- bori born boro borr brcb bric brin brio brno brob broc bron broo bror brrr c-bo cbbc cbcc cbcn cbcr cbir cbrn ccbc ccbn cccb cccc ccci ccic ccii ccir ccnb ccnc ccni ccnr ccob ccoc ccrc ccri cibc cibi cibo cicc cici cico cicr ciii cin- cinc cini cino ciob cion cior cirb circ ciri ciro cirr cnbc cnci cnco cnib cnic cnrc cnrr cobb cobi cobo coco coin coir con- conc coni conn cono coob coon cor- corb corc cori corn coro corr crbc crcc crcr crib cric crin crob croc cron croo cror i-no ibon ibrc ibri ibro icbc iccb iccc icci iccn icco iccr icnb icnc icoc icon icor icrc icrr iiii iiio iino iioi iioo iirc inbo incb inci inco incr inni inno innr ino- inoi inon inor inri inro iobi ioci ioii ioio ioni ionn iono iooi iooo iori ircc iri- iric irin irio irob iroc iron irrc irri n-ii nbbc nbbo nbcc nbci nbco nbic ncbc ncbi nccc ncci nccn nccr ncnc ncoc ncor ncrc ncri nibi nibo nicc nici nico niir nini nino nion nioo niro nnnn nobc nobi nobo noci noco noib noin noio noir non- noni nonn nono noo- noob noon nooo noor nor- norb norc nori norn noro norr nric nroc nron nrrc obbo obin oboi obon obor obri obro ocbc occc occi occn ocin ocon ocro ocrr oici oiii oion onc- onco onic onir onni onno onon onor oobi oocr oooo orbb orbi orbo orci orco ori- oric orin orio ornc orni orno oro- oron oror orri orro rbbb rbbr rcbc rcbo rccb rccc rcic rcnr rcon rib- ribo ricc rico riin rinn rino rion riri rnbr rnco rnin rob- robb robi robo rocc roco roin roio roir ronc roni rono roob rooi roon roor rorc rori roro rrrr