-er bbb bbe bbg bbi bbo bbr be- beb bee beg bei beo ber bev bgb bge bgg bgi bgo bgr bgv bi- bib bie big bii bio bir biv bob boe bog boi boo bor bov brb bre brg bri bro brr brv bvb bve bvg bvi bvo bvr bvv ebb ebe ebg ebi ebo ebr ebv eeb eee eeg eeo eer eev egb ege egg egi ego egr eib eie eig eii eio eir eiv eo- eob eoe eog eoi eoo eor erb ere erg eri ero err erv evb eve evg evi evo evr evv gbe gbg gbi gbo gbr gbv ge- geb gee geg gei geo ger gev ggb ggg ggi ggo ggr ggv gib gie gig gii gio gir giv gob goe gog goi goo gor gov grb gre grg gri gro grr grv gvb gve gvg gvi gvo gvr i-v ibb ibe ibg ibi ibo ibr ibv ie- iee ieg iei ier iev igb ige igg igi igo igr iib iie iii iio iir io- iob ioe iog ioi ioo ior iov ir- irb ire irg iri iro irr irv ivb ive ivg ivi ivo ivr ivv o-i ob- obb obe obg obi obo obr obv oeb oee oeg oei oeo oer oge ogg ogi ogo oib oie oii oio oir oiv oo- oob oog ooi ooo oor oov or- orb ore org ori oro orr orv ov- ovb ove ovi ovo ovv rbb rbe rbg rbi rbo rbr re- reb ree reg rei reo rer rev rgb rge rgg rgi rgo rgr rgv rib rie rig rii rio rir riv rob roe rog roi roo ror rov rrb rrg rri rrr rvb rve rvg rvi rvo rvr rvv v-e vbg vbi vbo vbr vbv veb vee veg vei veo ver vgg vgo vgr vi- vib vie vig vii vio vir viv vob voe vog voi voo vor vov vrb vre vrg vri vrr vvb vvg vvi vvo vvr vvv