bbb bbi bbk bbr bbs bi- bib bii bik bir bis bkb bkk bkr bks brb bri brk brr brs bsb bsi bsk bsr bss ibb ibi ibk ibr ibs iib iii iir iis ikb iki ikk ikr iks ir- irb iri irk irr irs is- isb isi isk isr iss kbb kbi kbk kbr kbs kib kii kik kir kis kkb kki kkk kkr kks kri krk krr krs ksb ksi ksk ksr kss rbb rbi rbk rbr rbs rib rii rik rir ris rkb rkk rks rrb rri rrk rrr rrs rsb rsi rsk rsr rss sbb sbi sbk sbr sbs sib sii sik sir sis sk- skb ski skk skr sks sr- srb sri srk srr srs ss- ssb ssi ssk ssr sss