bbb bbi bbn bbr bbs bby bi- bib bii bin bir bis biy bnb bni bnn bnr bns brb bri brn brr brs bry bsb bsi bsn bsr bss bsy by- byi byn byr bys ibb ibi ibn ibr ibs iby iib iii iin iir iis in- inb ini inn inr ins iny ir- irb iri irn irr irs iry is- isb isi isn isr iss isy iyr iys iyy n-i nbb nbi nbn nbr nbs nib nii nin nir nis nnb nni nnn nns nrb nri nrn nrr nrs nry nsb nsi nsn nsr nss nsy nyn nys nyy rbb rbi rbn rbr rbs rib rii rin rir ris riy rnb rni rnn rnr rns rny rrb rri rrn rrr rrs rsb rsi rsn rsr rss ry- ryn ryr rys ryy sbb sbi sbn sbr sbs sby sib sii sin sir sis snb sni snn snr sns sny sr- srb sri srn srr srs sry ss- ssb ssi ssn ssr sss sy- syb syi syn syr sys ybi ybr ybs yby yii yin yir yis ynn yns yny yrn yrs ysb ysi ysr yss ysy yyb yys yyy