bbbb bbci bbin bbrc bcbc bccc bcci bibb bibi bicc bici biin bin- binc bini binn birb biri birn birr bnib bnin bnrr brcb bric brin brrr cbbc cbcc cbcn cbcr cbir cbrn ccbc ccbn cccb cccc ccci ccic ccii ccir ccnb ccnc ccni ccnr ccrc ccri cibc cibi cicc cici cicr ciii cin- cinc cini cirb circ ciri cirr cnbc cnci cnib cnic cnrc cnrr crbc crcc crcr crib cric crin ibrc ibri icbc iccb iccc icci iccn iccr icnb icnc icrc icrr iiii iirc incb inci incr inni innr inri ircc iri- iric irin irrc irri n-ii nbbc nbcc nbci nbic ncbc ncbi nccc ncci nccn nccr ncnc ncrc ncri nibi nicc nici niir nini nnnn nric nrrc rbbb rbbr rcbc rccb rccc rcic rcnr rib- ricc riin rinn riri rnbr rnin rrrr