bbbb bbci bbeb bcbc bcbg bccc bcci bcec bcie bebb bebe bebi bebo beci beeb beeg begg begi bego beic beo- bibb bibe bibi bibo bicc bice bicg bici bico bieb bigb bigc bige bigg bigo bio- bioc biog bioi bobb bobe bobi bobo boce boco boec boee boeo boge bogg bogi bogo boi- boie boii boob booc booe boog c-bo cbbc cbcc cbce cbec cbee cbgb ccbc cccb cccc ccci ccee ccgc ccic ccii ccob ccoc cec- cece ceci ceco ceeb ceec cege cego cgcc cgcg cibc cibe cibi cibo cicc cici cico ciee cigi ciii ciob cobb cobe cobi cobo coce coco cogi cogo coob ebbc ebbo ebcc ebic eboe eboo ecbc ecbe eccb eccc ecce ecci ecco ecib ecig eco- ecog eeee eeoc egbe egcc egcg egec egee eggb egge eggi eggo ego- egoi eico eiec eiei eige eigg gbbo gc-c gcbc gccc gcic gcii gebe gebi gece gege gegg gego geic geie geig geo- geog gggg gibb gibe gige gigg gigi gigo giog gioi gobe gobi gobo goce gogi gogo goog gooi i-be i-go ibec ibeg ibge ibie icbc iccb iccc icci icco icec icee icgc icoc iecc ieie ieio igbc igbo igcc igoe igoo iiie iiii iiio iioi iioo iobi iocg ioci ioee ioii ioio iooi iooo o-eo obbo obec obie oboe oboi ocbc occc occi oce ocee oec- oecc oeec oegb ogb ogbe ogee ogge oggi ogog ogoi oici oigo oiii oobe oobi oooo