bbb bbi bbn bbo bbr bbs bby bi- bib bii bin bio bir bis biy bnb bni bnn bno bnr bns bob boi bon boo bor bos boy brb bri brn bro brr brs bry bsb bsi bsn bso bsr bss bsy by- byi byn byo byr bys ibb ibi ibn ibo ibr ibs iby iib iii iin iio iir iis in- inb ini inn ino inr ins iny io- iob ioi ion ioo ior ios ir- irb iri irn iro irr irs iry is- isb isi isn iso isr iss isy iyo iyr iys iyy n-i nbb nbi nbn nbo nbr nbs nib nii nin nio nir nis nnb nni nnn nno nns no- nob noi non noo nor nos noy nrb nri nrn nro nrr nrs nry nsb nsi nsn nso nsr nss nsy nyn nyo nys nyy o-i ob- obb obi obn obo obr obs oby oib oii oin oio oir ois on- onb oni onn ono onr ons ony oo- oob ooi oon ooo oor oos or- orb ori orn oro orr ors ory os- osb osi osn oso osr oss oyi oyo oys rbb rbi rbn rbo rbr rbs rib rii rin rio rir ris riy rnb rni rnn rno rnr rns rny rob roi ron roo ror ros roy rrb rri rrn rrr rrs rsb rsi rsn rso rsr rss ry- ryn ryo ryr rys ryy sbb sbi sbn sbo sbr sbs sby sib sii sin sio sir sis snb sni snn sno snr sns sny sob soi son soo sor sos soy sr- srb sri srn sro srr srs sry ss- ssb ssi ssn sso ssr sss sy- syb syi syn syr sys ybi ybr ybs yby yii yin yio yir yis ynn yns yny yob yoi yon yoo yor yos yoy yrn yro yrs ysb ysi yso ysr yss ysy yyb yys yyy