bbb bbi bbk bbr bbs bby bi- bib bii bik bir bis biy bkb bkk bkr bks brb bri brk brr brs bry bsb bsi bsk bsr bss bsy by- byi byk byr bys ibb ibi ibk ibr ibs iby iib iii iir iis ikb iki ikk ikr iks ir- irb iri irk irr irs iry is- isb isi isk isr iss isy iyr iys iyy kbb kbi kbk kbr kbs kib kii kik kir kis kkb kki kkk kkr kks kky kri krk krr krs kry ksb ksi ksk ksr kss kyr kys rbb rbi rbk rbr rbs rib rii rik rir ris riy rkb rkk rks rky rrb rri rrk rrr rrs rsb rsi rsk rsr rss ry- ryk ryr rys ryy sbb sbi sbk sbr sbs sby sib sii sik sir sis sk- skb ski skk skr sks sky sr- srb sri srk srr srs sry ss- ssb ssi ssk ssr sss sy- syb syi syk syr sys ybi ybr ybs yby yii yir yis yki ykk yrs ysb ysi ysk ysr yss ysy yyb yys yyy