bbb bbc bbh bbo bbw bby bcb bcc bch bco bcy bhb bhc bhh bho bhw bob boc boh boo bow boy bwb bwc bwh bwo bwy by- byc byh byo c-- cbb cbc cbh cbo cbw cby ccb ccc cch cco ccw ch- chb chc chh cho chw chy co- cob coc coh coo cow coy cw- cwb cwc cwh cwo cyb cyc cyo cyw hbb hbc hbh hbo hbw hby hcb hcc hch hco hcw hcy hhb hhc hhh hho hhw hhy hob hoc hoh hoo how hoy hw- hwb hwo hww hwy hy- hyb hyc hyh hyo hyw hyy ob- obb obc obh obo obw oby oc- ocb occ och oco ocw ohc ohh oho oo- oob ooc ooh ooo oow owb owc owh owo oww oyo wbb wbc wbo wbw wcb wcc wch wco wcw wh- whb whc whh who whw why wob woc woh woo wow woy wwc wwo www wy- wyc wyo ybc yby ycc ych yco ycw ycy yhc yhw yob yoc yoo yow yoy ywc yyb yyc yyy