bbb bbn bbo bbr bbs bbt bby bnb bnn bno bnr bns bnt bob bon boo bor bos bot boy brb brn bro brr brs brt bry bsb bsn bso bsr bss bst bsy btb btn bto btr bts btt bty by- byn byo byr bys byt nbb nbn nbo nbr nbs nbt nnb nnn nno nns nnt no- nob non noo nor nos not noy nrb nrn nro nrr nrs nrt nry nsb nsn nso nsr nss nst nsy ntb ntn nto ntr nts ntt nyn nyo nys nyt nyy ob- obb obn obo obr obs obt oby on- onb onn ono onr ons ont ony oo- oob oon ooo oor oos oot or- orb orn oro orr ors ort ory os- osb osn oso osr oss ost ot- otb otn oto otr ots ott oyo oys rbb rbn rbo rbr rbs rbt rnb rnn rno rnr rns rnt rny rob ron roo ror ros rot roy rrb rrn rrr rrs rrt rsb rsn rso rsr rss rst rtb rtn rto rtr rts rtt rty ry- ryn ryo ryr rys ryy sbb sbn sbo sbr sbs sbt sby snb snn sno snr sns snt sny sob son soo sor sos sot soy sr- srb srn sro srr srs srt sry ss- ssb ssn sso ssr sss sst stb stn sto str sts stt sty sy- syb syn syr sys syt tbb tbn tbo tbr tbs tbt tnb tnn tno tnr tns tnt to- tob ton too tor tos tot toy trb trn tro trr trs trt try tsb tsn tso tsr tss tst tsy ttb ttn tto ttr tts ttt tty tyn tyo tyr tys tyt ybr ybs yby ynn yns yny yob yon yoo yor yos yot yoy yrn yro yrs yrt ysb yso ysr yss yst ysy ytn yto ytr yts ytt yyb yys yyt yyy