-er bbb bbe bbg bbi bbk bbr be- beb bee beg bei bek ber bev bgb bge bgg bgi bgk bgr bgv bi- bib bie big bii bik bir biv bkb bke bkg bkk bkr bkv brb bre brg bri brk brr brv bvb bve bvg bvi bvk bvr bvv ebb ebe ebg ebi ebk ebr ebv eeb eee eeg eek eer eev egb ege egg egi egr eib eie eig eii eik eir eiv ekb eke ekg eki ekr ekv erb ere erg eri erk err erv evb eve evg evi evr evv gbe gbg gbi gbk gbr gbv ge- geb gee geg gei gek ger gev ggb ggg ggi ggr ggv gib gie gig gii gik gir giv gkb grb gre grg gri grk grr grv gvb gve gvg gvi gvk gvr i-v ibb ibe ibg ibi ibk ibr ibv ie- iee ieg iei iek ier iev igb ige igg igi igk igr iib iie iii iir ikb ike iki ikk ikr ikv ir- irb ire irg iri irk irr irv ivb ive ivg ivi ivr ivv kbb kbe kbi kbk kbr ke- keb kee keg kei kek ker kev kgb kgi kgv kib kie kig kii kik kir kiv kkb kke kki kkk kkr kkv krg kri krk krr krv kvb kvi kvk kvr kvv rbb rbe rbg rbi rbk rbr re- reb ree reg rei rek rer rev rgb rge rgg rgi rgk rgr rgv rib rie rig rii rik rir riv rkb rke rkg rkk rkv rrb rrg rri rrk rrr rvb rve rvg rvi rvr rvv v-e vbg vbi vbk vbr vbv veb vee veg vei vek ver vgg vgr vi- vib vie vig vii vik vir viv vkb vkg vrb vre vrg vri vrk vrr vvb vvg vvi vvr vvv