bbb bbg bbi bbk bbr bbt bgb bgg bgi bgk bgr bgt bi- bib big bii bik bir bit bkb bkg bkk bkr bkt brb brg bri brk brr brt btb btg bti btk btr btt gbg gbi gbk gbr gbt ggb ggg ggi ggr ggt gib gig gii gik gir git gkb gkt grb grg gri grk grr grt gtb gtg gti gtk gtr gtt ibb ibg ibi ibk ibr ibt igb igg igi igk igr igt iib iii iir iit ikb iki ikk ikr ikt ir- irb irg iri irk irr irt itb itg iti itk itt k-t kbb kbi kbk kbr kgb kgi kib kig kii kik kir kit kkb kki kkk kkr kkt krg kri krk krr krt ktb ktg ktk ktr ktt rbb rbg rbi rbk rbr rbt rgb rgg rgi rgk rgr rgt rib rig rii rik rir rit rkb rkg rkk rkt rrb rrg rri rrk rrr rrt rtb rtg rti rtk rtr rtt tbb tbg tbi tbk tbr tbt tgb tgg tgi tgk tgr tgt tib tig tii tik tir tit tkb tkg tkk tkr tkt trb trg tri trk trr trt ttb ttg tti ttk ttr ttt