bbb bbi bbn bbo bbr bbs bbt bby bi- bib bii bin bio bir bis bit biy bnb bni bnn bno bnr bns bnt bob boi bon boo bor bos bot boy brb bri brn bro brr brs brt bry bsb bsi bsn bso bsr bss bst bsy btb bti btn bto btr bts btt bty by- byi byn byo byr bys byt ibb ibi ibn ibo ibr ibs ibt iby iib iii iin iio iir iis iit in- inb ini inn ino inr ins int iny io- iob ioi ion ioo ior ios iot ir- irb iri irn iro irr irs irt iry is- isb isi isn iso isr iss ist isy itb iti itn ito its itt ity iyo iyr iys iyt iyy n-i nbb nbi nbn nbo nbr nbs nbt nib nii nin nio nir nis nit nnb nni nnn nno nns nnt no- nob noi non noo nor nos not noy nrb nri nrn nro nrr nrs nrt nry nsb nsi nsn nso nsr nss nst nsy ntb nti ntn nto ntr nts ntt nyn nyo nys nyt nyy o-i ob- obb obi obn obo obr obs obt oby oib oii oin oio oir ois oit on- onb oni onn ono onr ons ont ony oo- oob ooi oon ooo oor oos oot or- orb ori orn oro orr ors ort ory os- osb osi osn oso osr oss ost ot- otb oti otn oto otr ots ott oyi oyo oys rbb rbi rbn rbo rbr rbs rbt rib rii rin rio rir ris rit riy rnb rni rnn rno rnr rns rnt rny rob roi ron roo ror ros rot roy rrb rri rrn rrr rrs rrt rsb rsi rsn rso rsr rss rst rtb rti rtn rto rtr rts rtt rty ry- ryn ryo ryr rys ryy sbb sbi sbn sbo sbr sbs sbt sby sib sii sin sio sir sis sit snb sni snn sno snr sns snt sny sob soi son soo sor sos sot soy sr- srb sri srn sro srr srs srt sry ss- ssb ssi ssn sso ssr sss sst stb sti stn sto str sts stt sty sy- syb syi syn syr sys syt tbb tbi tbn tbo tbr tbs tbt tib tii tin tio tir tis tit tiy tnb tni tnn tno tnr tns tnt to- tob toi ton too tor tos tot toy trb tri trn tro trr trs trt try tsb tsi tsn tso tsr tss tst tsy ttb tti ttn tto ttr tts ttt tty tyn tyo tyr tys tyt ybi ybr ybs yby yii yin yio yir yis yit ynn yns yny yob yoi yon yoo yor yos yot yoy yrn yro yrs yrt ysb ysi yso ysr yss yst ysy ytn yto ytr yts ytt yyb yys yyt yyy