bbb bbc bbh bbo bbr bbw bcb bcc bch bco bcr bhb bhc bhh bho bhr bhw bob boc boh boo bor bow brb brh bro brr brw bwb bwc bwh bwo bwr c-- cbb cbc cbh cbo cbr cbw ccb ccc cch cco ccr ccw ch- chb chc chh cho chr chw co- cob coc coh coo cor cow crb crc crh cro crr crw cw- cwb cwc cwh cwo cwr hbb hbc hbh hbo hbr hbw hcb hcc hch hco hcr hcw hhb hhc hhh hho hhr hhw hob hoc hoh hoo hor how hr- hrb hrc hrh hro hrr hrw hw- hwb hwo hwr hww ob- obb obc obh obo obr obw oc- ocb occ och oco ocr ocw ohc ohh oho ohr oo- oob ooc ooh ooo oor oow or- orb orc orh oro orr owb owc owh owo oww rbb rbc rbh rbo rbr rbw rcb rcc rch rco rcr rcw rh- rhb rhc rhh rho rhr rob roc roh roo ror row rrb rrc rrh rrr rwb rwc rwh rwr wbb wbc wbo wbr wbw wcb wcc wch wco wcr wcw wh- whb whc whh who whr whw wob woc woh woo wor wow wr- wrc wrh wro wrr wrw wwc wwo www