bbb bbl bbr bbs bbx blb bll blr bls blx brb brl brr brs brx bsb bsl bsr bss bsx bxb bxl bxx lbb lbl lbr lbs lbx llb lll llr lls lrb lrr lrs lsb lsl lsr lss lxr lxx rbb rbl rbr rbs rbx rll rlr rls rrb rrl rrr rrs rsb rsl rsr rss rsx rxr rxs sbb sbl sbr sbs sbx slb sll slr sls slx sr- srb srl srr srs srx ss- ssb ssl ssr sss ssx sxl sxs xbl xbr xbx xlb xlr xls xrx xsb xsl xss xxl xxx

bbbb bbbs bblb bbls blls blss brls brrr brrs brsb brsr lblr lbrs llbs llll lrrr ls-r lssr lxxx rbbb rbbr rbbs rbsl rbss rlls rrrr rssl sbbs slrs ssbr ssrl ssrs sssb ssss sxbl xbrl xxxx

brrrr llrrs sssrb sssss xbxrx

bbbbbb sxslls

bbbbbbb sssssss xxxxxxx

bbbbbbbb

xxxxxxxxxxxx

bbbbbbbbbbbbbbb