bbb bbh bbn bbo bbr bbs bhb bhh bho bhr bhs bnb bnn bno bnr bns bob boh bon boo bor bos brb brh brn bro brr brs bsb bsh bsn bso bsr bss hbb hbh hbn hbo hbr hbs hhb hhh hhn hho hhr hhs hnb hnh hnn hno hns hob hoh hon hoo hor hos hr- hrb hrh hrn hro hrr hrs hsb hsh hsn hsr hss nbb nbn nbo nbr nbs nhb nhh nhn nhr nhs nnb nnh nnn nno nns no- nob noh non noo nor nos nrb nrn nro nrr nrs nsb nsh nsn nso nsr nss ob- obb obh obn obo obr obs ohh ohn oho ohr ohs on- onb onh onn ono onr ons oo- oob ooh oon ooo oor oos or- orb orh orn oro orr ors os- osb osh osn oso osr oss rbb rbh rbn rbo rbr rbs rh- rhb rhh rhn rho rhr rhs rnb rnh rnn rno rnr rns rob roh ron roo ror ros rrb rrh rrn rrr rrs rsb rsh rsn rso rsr rss sbb sbh sbn sbo sbr sbs sh- shb shh shn sho shr shs snb snn sno snr sns sob soh son soo sor sos sr- srb srh srn sro srr srs ss- ssb ssh ssn sso ssr sss