-th bbb bbh bbo bbr bbs bbt bby bhb bhh bho bhr bhs bht bob boh boo bor bos bot boy brb brh bro brr brs brt bry bsb bsh bso bsr bss bst bsy btb bth bto btr bts btt bty by- byh byo byr bys byt hbb hbh hbo hbr hbs hbt hby hhb hhh hho hhr hhs hht hhy hob hoh hoo hor hos hot hoy hr- hrb hrh hro hrr hrs hrt hsb hsh hsr hss hst hsy htb hth hto htr hts htt hty hy- hyb hyh hyo hyr hys hyt hyy ob- obb obh obo obr obs obt oby ohh oho ohr ohs oht oo- oob ooh ooo oor oos oot or- orb orh oro orr ors ort ory os- osb osh oso osr oss ost ot- otb oth oto otr ots ott oyo oys rbb rbh rbo rbr rbs rbt rh- rhb rhh rho rhr rhs rht rob roh roo ror ros rot roy rrb rrh rrr rrs rrt rsb rsh rso rsr rss rst rtb rto rtr rts rtt rty ry- ryo ryr rys ryy sbb sbh sbo sbr sbs sbt sby sh- shb shh sho shr shs sht shy sob soh soo sor sos sot soy sr- srb srh sro srr srs srt sry ss- ssb ssh sso ssr sss sst stb sth sto str sts stt sty sy- syb syh syr sys syt tbb tbh tbo tbr tbs tbt th- thb thh tho thr ths tht thy to- tob toh too tor tos tot toy trb trh tro trr trs trt try tsb tsh tso tsr tss tst tsy ttb tth tto ttr tts ttt tty tyo tyr tys tyt ybr ybs yby yhs yht yob yoo yor yos yot yoy yro yrs yrt ysb yso ysr yss yst ysy yth yto ytr yts ytt yyb yys yyt yyy