-er bbb bbe bbg bbi bbl bbr bbt be- beb bee beg bei bel ber bet bev bgb bge bgg bgi bgl bgr bgt bgv bi- bib bie big bii bil bir bit biv blb ble blg bli bll blr blt blv brb bre brg bri brl brr brt brv btb bte btg bti btl btr btt btv bvb bve bvg bvi bvl bvr bvt bvv ebb ebe ebg ebi ebl ebr ebt ebv eeb eee eeg eel eer eet eev egb ege egg egi egl egr egt eib eie eig eii eil eir eit eiv elb ele elg eli ell elr elt elv erb ere erg eri erl err ert erv etb ete etg eti etl etr ett etv evb eve evg evi evl evr evt evv gbe gbg gbi gbl gbr gbt gbv ge- geb gee geg gei gel ger get gev ggb ggg ggi ggr ggt ggv gib gie gig gii gil gir git giv glb gle glg gli gll glr glt glv grb gre grg gri grl grr grt grv gtb gte gtg gti gtl gtr gtt gtv gvb gve gvg gvi gvl gvr gvt i-v ibb ibe ibg ibi ibl ibr ibt ibv ie- iee ieg iei iel ier iet iev igb ige igg igi igl igr igt iib iie iii iil iir iit il- ilb ile ilg ili ill ilr ilt ilv ir- irb ire irg iri irl irr irt irv itb ite itg iti itl itt itv ivb ive ivg ivi ivl ivr ivt ivv lbb lbe lbg lbi lbl lbr lbt lbv leb lee leg lei lel ler let lev lgb lge lgg lgi lgl lgr lgt lgv lib lie lig lii lil lir lit liv llb lle llg lli lll llr llt llv lrb lrg lri lrr lrt lrv ltb lte ltg lti ltl ltr ltt ltv lvb lve lvg lvi lvl lvr lvt lvv rbb rbe rbg rbi rbl rbr rbt re- reb ree reg rei rel rer ret rev rgb rge rgg rgi rgr rgt rgv rib rie rig rii ril rir rit riv rle rlg rli rll rlr rlt rrb rrg rri rrl rrr rrt rtb rte rtg rti rtl rtr rtt rtv rvb rve rvg rvi rvl rvr rvt rvv tbb tbe tbg tbi tbl tbr tbt tbv te- teb tee teg tei tel ter tet tev tgb tge tgg tgi tgl tgr tgt tgv tib tie tig tii til tir tit tiv tle tlg tli tll tlr tlt tlv trb tre trg tri trl trr trt trv ttb tte ttg tti ttl ttr ttt ttv tvb tve tvg tvi tvl tvr tvt v-e vbg vbi vbl vbr vbv veb vee veg vei vel ver vet vgg vgl vgr vgt vi- vib vie vig vii vil vir vit viv vl- vlb vle vll vlt vlv vrb vre vrg vri vrr vrt vtb vte vtg vti vtl vtr vtt vtv vvb vvg vvi vvr vvt vvv