bbb bbg bbi bbr bbt bgb bgg bgi bgr bgt bgz bi- bib big bii bir bit biz brb brg bri brr brt brz btb btg bti btr btt btz bzr bzz gbg gbi gbr gbt gbz ggb ggg ggi ggr ggt ggz gib gig gii gir git giz grb grg gri grr grt gtb gtg gti gtr gtt gzr ibb ibg ibi ibr ibt ibz igb igg igi igr igt iib iii iir iit ir- irb irg iri irr irt itb itg iti itt itz izi izz rbb rbg rbi rbr rbt rgb rgg rgi rgr rgt rib rig rii rir rit riz rrb rrg rri rrr rrt rtb rtg rti rtr rtt rtz rzb tbb tbg tbi tbr tbt tbz tgb tgg tgi tgr tgt tgz tib tig tii tir tit tiz trb trg tri trr trt trz ttb ttg tti ttr ttt z-g zbb zbr zbt zgb zgg zgi zib zig zir zit ziz ztr zzr zzt zzz