-er bbb bbe bbg bbi bbl bbr bbt be- beb bee beg bei bel ber bet bgb bge bgg bgi bgl bgr bgt bi- bib bie big bii bil bir bit blb ble blg bli bll blr blt brb bre brg bri brl brr brt btb bte btg bti btl btr btt ebb ebe ebg ebi ebl ebr ebt eeb eee eeg eel eer eet egb ege egg egi egl egr egt eib eie eig eii eil eir eit elb ele elg eli ell elr elt erb ere erg eri erl err ert etb ete etg eti etl etr ett gbe gbg gbi gbl gbr gbt ge- geb gee geg gei gel ger get ggb ggg ggi ggr ggt gib gie gig gii gil gir git glb gle glg gli gll glr glt grb gre grg gri grl grr grt gtb gte gtg gti gtl gtr gtt ibb ibe ibg ibi ibl ibr ibt ie- iee ieg iei iel ier iet igb ige igg igi igl igr igt iib iie iii iil iir iit il- ilb ile ilg ili ill ilr ilt ir- irb ire irg iri irl irr irt itb ite itg iti itl itt lbb lbe lbg lbi lbl lbr lbt leb lee leg lei lel ler let lgb lge lgg lgi lgl lgr lgt lib lie lig lii lil lir lit llb lle llg lli lll llr llt lrb lrg lri lrr lrt ltb lte ltg lti ltl ltr ltt rbb rbe rbg rbi rbl rbr rbt re- reb ree reg rei rel rer ret rgb rge rgg rgi rgr rgt rib rie rig rii ril rir rit rle rlg rli rll rlr rlt rrb rrg rri rrl rrr rrt rtb rte rtg rti rtl rtr rtt tbb tbe tbg tbi tbl tbr tbt te- teb tee teg tei tel ter tet tgb tge tgg tgi tgl tgr tgt tib tie tig tii til tir tit tle tlg tli tll tlr tlt trb tre trg tri trl trr trt ttb tte ttg tti ttl ttr ttt