bbb bbg bbl bbr bbs bgb bgg bgl bgr bgs blb blg bll blr bls brb brg brl brr brs bsb bsg bsl bsr bss gbg gbl gbr gbs ggb ggg ggr ggs glb glg gll glr gls grb grg grl grr grs gsb gsg gsl gsr gss lbb lbg lbl lbr lbs lgb lgg lgl lgr lgs llb llg lll llr lls lrb lrg lrr lrs lsb lsg lsl lsr lss rbb rbg rbl rbr rbs rgb rgg rgr rgs rlg rll rlr rls rrb rrg rrl rrr rrs rsb rsg rsl rsr rss sbb sbg sbl sbr sbs sgb sgg sgl sgr sgs slb slg sll slr sls sr- srb srg srl srr srs ss- ssb ssg ssl ssr sss