b-u bbb bbn bbo bbr bbs bbt bbu bby bnb bnn bno bnr bns bnt bnu bob bon boo bor bos bot bou boy brb brn bro brr brs brt bru bry bsb bsn bso bsr bss bst bsu bsy btb btn bto btr bts btt btu bty bub bun buo bur bus but buu buy by- byn byo byr bys byt byu nbb nbn nbo nbr nbs nbt nbu nnb nnn nno nns nnt nnu no- nob non noo nor nos not nou noy nrb nrn nro nrr nrs nrt nru nry nsb nsn nso nsr nss nst nsu nsy ntb ntn nto ntr nts ntt ntu nub nun nuo nur nus nut nuu nuy nyn nyo nys nyt nyu nyy ob- obb obn obo obr obs obt obu oby on- onb onn ono onr ons ont onu ony oo- oob oon ooo oor oos oot or- orb orn oro orr ors ort oru ory os- osb osn oso osr oss ost osu ot- otb otn oto otr ots ott otu ou- oun ouo our ous out oyo oys rbb rbn rbo rbr rbs rbt rbu rnb rnn rno rnr rns rnt rnu rny rob ron roo ror ros rot rou roy rrb rrn rrr rrs rrt rru rsb rsn rso rsr rss rst rsu rtb rtn rto rtr rts rtt rtu rty rub run ruo rur rus rut ruu ruy ry- ryn ryo ryr rys ryu ryy sbb sbn sbo sbr sbs sbt sbu sby snb snn sno snr sns snt snu sny sob son soo sor sos sot sou soy sr- srb srn sro srr srs srt sry ss- ssb ssn sso ssr sss sst ssu stb stn sto str sts stt stu sty sub sun suo sur sus sut suu suy sy- syb syn syr sys syt syu tbb tbn tbo tbr tbs tbt tbu tnb tnn tno tnr tns tnt to- tob ton too tor tos tot tou toy trb trn tro trr trs trt tru try tsb tsn tso tsr tss tst tsu tsy ttb ttn tto ttr tts ttt ttu tty tub tun tuo tur tus tut tuu tuy tyn tyo tyr tys tyt ubb ubn ubo ubr ubs ubt ubu uby un- unb unn uno unr uns unt unu uny uob uon uoo uor uos uot ur- urb urn uro urr urs urt uru ury usb usn uso usr uss ust usu utb utn uto utr uts utt utu uty uun uur uus uut uuu uyo uys uyu ybr ybs yby ynn yns ynu yny yob yon yoo yor yos yot you yoy yrn yro yrs yrt yru ysb yso ysr yss yst ysu ysy ytn yto ytr yts ytt ytu yun yuo yur yus yut yuu yuy yyb yys yyt yyu yyy