bbb bbk bbn bbo bbr bbs bby bkb bkk bkn bko bkr bks bkv bnb bnk bnn bno bnr bns bnv bob bok bon boo bor bos bov boy brb brk brn bro brr brs brv bry bsb bsk bsn bso bsr bss bsv bsy bvb bvk bvn bvo bvr bvs bvv by- byk byn byo byr bys kbb kbk kbn kbo kbr kbs kkb kkk kkn kkr kks kkv kky kn- knk knn kno knr kob kok kon koo kor kos koy krk krn kro krr krs krv kry ksb ksk ksn kso ksr kss ksv kvb kvk kvn kvo kvr kvs kvv kyn kyo kyr kys nbb nbk nbn nbo nbr nbs nbv nkk nkn nko nkr nks nky nnb nnk nnn nno nns nnv no- nob nok non noo nor nos nov noy nrb nrk nrn nro nrr nrs nrv nry nsb nsk nsn nso nsr nss nsv nsy nvb nvk nvn nvv nyk nyn nyo nys nyy ob- obb obk obn obo obr obs obv oby okb okk oko okr oks on- onb onk onn ono onr ons ony oo- oob ook oon ooo oor oos oov or- orb ork orn oro orr ors orv ory os- osb osk osn oso osr oss osv ov- ovb ovo ovs ovv oyo oys rbb rbk rbn rbo rbr rbs rkb rkk rko rks rkv rky rnb rnn rno rnr rns rnv rny rob rok ron roo ror ros rov roy rrb rrk rrn rrr rrs rsb rsk rsn rso rsr rss rsv rvb rvn rvo rvr rvs rvv rvy ry- ryk ryn ryo ryr rys ryy sbb sbk sbn sbo sbr sbs sbv sby sk- skb skk sko skr sks sky snb snk snn sno snr sns snv sny sob sok son soo sor sos sov soy sr- srb srk srn sro srr srs srv sry ss- ssb ssk ssn sso ssr sss ssv svb svk svn svo svr svs svv svy sy- syb syk syn syr sys vbk vbo vbr vbs vbv vkb vn- vno vnr vns vnv vob vok von voo vor vos vov voy vrb vrk vrn vrr vrs vry vsb vsk vsn vso vsr vss vsv vvb vvo vvr vvs vvv vyn ybr ybs yby ykk ykn ynk ynn yns yny yob yok yon yoo yor yos yoy yrn yro yrs ysb ysk yso ysr yss ysy yvo yvr yvy yyb yys yyy