-th bbb bbc bbh bbo bbr bbt bby bcb bcc bch bco bcr bct bcy bhb bhc bhh bho bhr bht bob boc boh boo bor bot boy brb brh bro brr brt bry btb btc bth bto btr btt bty by- byc byh byo byr byt c-- cbb cbc cbh cbo cbr cbt cby ccb ccc cch cco ccr cct ch- chb chc chh cho chr cht chy co- cob coc coh coo cor cot coy crb crc crh cro crr crt cry ctb ctc cth cto ctr ctt cty cyb cyc cyo cyr cyt hbb hbc hbh hbo hbr hbt hby hcb hcc hch hco hcr hct hcy hhb hhc hhh hho hhr hht hhy hob hoc hoh hoo hor hot hoy hr- hrb hrc hrh hro hrr hrt htb htc hth hto htr htt hty hy- hyb hyc hyh hyo hyr hyt hyy ob- obb obc obh obo obr obt oby oc- ocb occ och oco ocr oct ohc ohh oho ohr oht oo- oob ooc ooh ooo oor oot or- orb orc orh oro orr ort ory ot- otb otc oth oto otr ott oyo rbb rbc rbh rbo rbr rbt rcb rcc rch rco rcr rct rh- rhb rhc rhh rho rhr rht rob roc roh roo ror rot roy rrb rrc rrh rrr rrt rtb rtc rto rtr rtt rty ry- ryc ryo ryr ryy tbb tbc tbh tbo tbr tbt tcb tcc tch tco tcr tct th- thb thc thh tho thr tht thy to- tob toc toh too tor tot toy trb trc trh tro trr trt try ttb ttc tth tto ttr ttt tty tyc tyo tyr tyt ybc ybr yby ycc ych yco ycy yhc yht yob yoc yoo yor yot yoy yrc yro yrt ytc yth yto ytr ytt yyb yyc yyt yyy