bbb bbh bbk bbn bbo bbr bbs bhb bhh bhk bho bhr bhs bkb bkk bkn bko bkr bks bnb bnk bnn bno bnr bns bob boh bok bon boo bor bos brb brh brk brn bro brr brs bsb bsh bsk bsn bso bsr bss hbb hbh hbk hbn hbo hbr hbs hhb hhh hhk hhn hho hhr hhs hkb hkh hkk hkn hko hkr hks hnb hnh hnk hnn hno hns hob hoh hok hon hoo hor hos hr- hrb hrh hrk hrn hro hrr hrs hsb hsh hsk hsn hsr hss kbb kbh kbk kbn kbo kbr kbs khh khk khn kho khr khs kkb kkh kkk kkn kkr kks kn- knk knn kno knr kob koh kok kon koo kor kos krk krn kro krr krs ksb ksh ksk ksn kso ksr kss nbb nbk nbn nbo nbr nbs nhb nhh nhk nhn nhr nhs nkk nkn nko nkr nks nnb nnh nnk nnn nno nns no- nob noh nok non noo nor nos nrb nrk nrn nro nrr nrs nsb nsh nsk nsn nso nsr nss ob- obb obh obk obn obo obr obs ohh ohn oho ohr ohs okb okk oko okr oks on- onb onh onk onn ono onr ons oo- oob ooh ook oon ooo oor oos or- orb orh ork orn oro orr ors os- osb osh osk osn oso osr oss rbb rbh rbk rbn rbo rbr rbs rh- rhb rhh rhn rho rhr rhs rkb rkk rko rks rnb rnh rnn rno rnr rns rob roh rok ron roo ror ros rrb rrh rrk rrn rrr rrs rsb rsh rsk rsn rso rsr rss sbb sbh sbk sbn sbo sbr sbs sh- shb shh shk shn sho shr shs sk- skb skh skk sko skr sks snb snk snn sno snr sns sob soh sok son soo sor sos sr- srb srh srk srn sro srr srs ss- ssb ssh ssk ssn sso ssr sss