-er bbb bbe bbg bbi bbl bbr be- beb bee beg bei bel ber bgb bge bgg bgi bgl bgr bi- bib bie big bii bil bir blb ble blg bli bll blr brb bre brg bri brl brr ebb ebe ebg ebi ebl ebr eeb eee eeg eel eer egb ege egg egi egl egr eib eie eig eii eil eir elb ele elg eli ell elr erb ere erg eri erl err gbe gbg gbi gbl gbr ge- geb gee geg gei gel ger ggb ggg ggi ggr gib gie gig gii gil gir glb gle glg gli gll glr grb gre grg gri grl grr ibb ibe ibg ibi ibl ibr ie- iee ieg iei iel ier igb ige igg igi igl igr iib iie iii iil iir il- ilb ile ilg ili ill ilr ir- irb ire irg iri irl irr lbb lbe lbg lbi lbl lbr leb lee leg lei lel ler lgb lge lgg lgi lgl lgr lib lie lig lii lil lir llb lle llg lli lll llr lrb lrg lri lrr rbb rbe rbg rbi rbl rbr re- reb ree reg rei rel rer rgb rge rgg rgi rgr rib rie rig rii ril rir rle rlg rli rll rlr rrb rrg rri rrl rrr