bbbb bbci bbeb bcbc bccc bcci bcec bcie bebb bebe bebi bebo beci beck beeb beek beic beik beke beki beko beo- beok bibb bibe bibi bibo bicc bice bici bick bico bieb bike biko bio- bioc bioi bobb bobe bobi bobo boce bock boco boec boee boeo boi- boie boii boke boki boko boob booc booe book c-bo cbbc cbcc cbce cbec cbee cbko ccbc cccb cccc ccci ccee ccic ccii ccob ccoc cec- cece ceci ceco ceeb ceec ceke cibc cibe cibi cibo cicc cici cico ciee ciii ciko ciob ckbc ckbe ckbi ckck ckco ckob ckoc ckoi ckoo cobb cobe cobi cobo coce cock coco cok- coke coko coob cook ebbc ebbo ebcc ebic eboe eboo ecbc ecbe eccb eccc ecce ecci ecco ecib ecko eco- eeee eeke eeoc eick eico eiec eiei eike eiki eiko ekco ekeb ekek ekki ekoi i-be ibec ibie icbc iccb iccc icci icco icec icee icke icoc iecc ieie ieio iiie iiii iiio iioi iioo ikee ikki ikko ikoo iobi ioci ioee ioii ioio ioke ioko iooi iooo k-ci kbbb kbbc kbbe kbbi kbbk kbbo kbcb kbce kbci kbck kbco kbeb kbec kbee kbek kbeo kbib kbic kbie kbik kbio kbkb kbkk kbko kbob kboc kboe kboi kbok kboo kcbc kcbi kcbk kccb kccc kcci kcck kceb kcec kcee kcei kceo kcic kcie kcii kckc kckk kcko kcob kcoe kebb kebc kebe kebi keck keco keek keib keii keik keio kekb kekc keke keki keko keok kibb kibc kibe kibi kibo kicb kicc kice kick kiic kiii kiik kikc kiki kikk kiko kioc kioe kioi kiok kioo kkbb kkbe kkbi kkbo kkcb kkci kkck kkco kkic kkik kkkk kkob kkoo kobb kobc kobe kobi kobk kobo kocb koci kock koei koii kokb kokc koke koki kokk koko koob kooc kooi kook kooo o-eo obbo obec obie obkb oboe oboi obok ocbc occc occi oce ocee ocke oec- oecc oeec oici oick oiii oike oiko okic okie okko okok oobe oobi oooo