bbb bbh bbk bbn bbo bbr bbs bbx bhb bhh bhk bho bhr bhs bhx bkb bkk bkn bko bkr bks bkx bnb bnk bnn bno bnr bns bnx bob boh bok bon boo bor bos box brb brh brk brn bro brr brs brx bsb bsh bsk bsn bso bsr bss bsx bxb bxn bxo bxx hbb hbh hbk hbn hbo hbr hbs hbx 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 hox hr- hrb hrh hrk hrn hro hrr hrs hsb hsh hsk hsn hsr hss hsx kbb kbh kbk kbn kbo kbr kbs kbx khh khk khn kho khr khs kkb kkh kkk kkn kkr kks kn- knk knn kno knr knx kob koh kok kon koo kor kos krk krn kro krr krs ksb ksh ksk ksn kso ksr kss kxo nbb nbk nbn nbo nbr nbs nbx 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 nox nrb nrk nrn nro nrr nrs nrx nsb nsh nsk nsn nso nsr nss nsx ob- obb obh obk obn obo obr obs obx ohh ohn oho ohr ohs okb okk oko okr oks on- onb onh onk onn ono onr ons onx oo- oob ooh ook oon ooo oor oos oox or- orb orh ork orn oro orr ors orx os- osb osh osk osn oso osr oss osx ox- oxb oxn oxo oxx rbb rbh rbk rbn rbo rbr rbs rbx rh- rhb rhh rhn rho rhr rhs rkb rkk rko rks rnb rnh rnn rno rnr rns rob roh rok ron roo ror ros rox rrb rrh rrk rrn rrr rrs rsb rsh rsk rsn rso rsr rss rsx rxr rxs sbb sbh sbk sbn sbo sbr sbs sbx sh- shb shh shk shn sho shr shs sk- skb skh skk sko skr sks skx snb snk snn sno snr sns sob soh sok son soo sor sos sox sr- srb srh srk srn sro srr srs srx ss- ssb ssh ssk ssn sso ssr sss ssx sxn sxs xbr xbx xkb xks xnk xno xns xok xon xoo xor xos xox xrx xsb xss xxo xxx