bbb bbg bbi bbr bby bgb bgg bgi bgr bgv bi- bib big bii bir biv biy brb brg bri brr brv bry bvb bvg bvi bvr bvv by- byg byi byr gbg gbi gbr gbv gby ggb ggg ggi ggr ggv gib gig gii gir giv giy grb grg gri grr grv gry gvb gvg gvi gvr gy- gyb gyr i-v ibb ibg ibi ibr ibv iby igb igg igi igr igy iib iii iir ir- irb irg iri irr irv iry ivb ivg ivi ivr ivv ivy iyr iyy rbb rbg rbi rbr rgb rgg rgi rgr rgv rib rig rii rir riv riy rrb rrg rri rrr rvb rvg rvi rvr rvv rvy ry- ryg ryr ryy vbg vbi vbr vbv vgg vgr vi- vib vig vii vir viv viy vrb vrg vri vrr vry vvb vvg vvi vvr vvv vyg ybg ybi ybr yby yig yii yir yrg yvi yvr yvy yyb yyg yyy