bbb bbh bbo bbr bbs bby bhb bhh bho bhr bhs bob boh boo bor bos boy brb brh bro brr brs bry bsb bsh bso bsr bss bsy by- byh byo byr bys hbb hbh hbo hbr hbs hby hhb hhh hho hhr hhs hhy hob hoh hoo hor hos hoy hr- hrb hrh hro hrr hrs hsb hsh hsr hss hsy hy- hyb hyh hyo hyr hys hyy ob- obb obh obo obr obs oby ohh oho ohr ohs oo- oob ooh ooo oor oos or- orb orh oro orr ors ory os- osb osh oso osr oss oyo oys rbb rbh rbo rbr rbs rh- rhb rhh rho rhr rhs rob roh roo ror ros roy rrb rrh rrr rrs rsb rsh rso rsr rss ry- ryo ryr rys ryy sbb sbh sbo sbr sbs sby sh- shb shh sho shr shs shy sob soh soo sor sos soy sr- srb srh sro srr srs sry ss- ssb ssh sso ssr sss sy- syb syh syr sys ybr ybs yby yhs yob yoo yor yos yoy yro yrs ysb yso ysr yss ysy yyb yys yyy