-er bbb bbe bbf bbg bbi bbl bbr be- beb bee bef beg bei bel ber bfb bfe bff bfg bfi bfl bfr bgb bge bgf bgg bgi bgl bgr bi- bib bie bif big bii bil bir blb ble blf blg bli bll blr brb bre brf brg bri brl brr ebb ebe ebf ebg ebi ebl ebr eeb eee eef eeg eel eer ef- efb efe eff efg efi efl efr egb ege egf egg egi egl egr eib eie eif eig eii eil eir elb ele elf elg eli ell elr erb ere erf erg eri erl err fbb fbe fbf fbg fbi fbl fbr feb fee fef feg fei fel fer ffe fff ffg ffi ffl ffr fgb fge fgf fgg fgi fgl fgr fib fie fif fig fii fil fir flb fle flf flg fli fll flr frb fre frf frg fri frl frr gbe gbf gbg gbi gbl gbr ge- geb gee gef geg gei gel ger gfb gfe gff gfi gfl gfr ggb ggg ggi ggr gib gie gif gig gii gil gir glb gle glf glg gli gll glr grb gre grf grg gri grl grr i-f ibb ibe ibf ibg ibi ibl ibr ie- iee ief ieg iei iel ier ifb ife iff ifg ifi ifl ifr igb ige igf igg igi igl igr iib iie iif iii iil iir il- ilb ile ilf ilg ili ill ilr ir- irb ire irf irg iri irl irr lbb lbe lbf lbg lbi lbl lbr leb lee lef leg lei lel ler lfb lfe lff lfg lfi lfl lfr lgb lge lgf lgg lgi lgl lgr lib lie lif lig lii lil lir llb lle llf llg lli lll llr lrb lrf lrg lri lrr rbb rbe rbf rbg rbi rbl rbr re- reb ree ref reg rei rel rer rfb rfe rff rfg rfi rfl rfr rgb rge rgf rgg rgi rgr rib rie rif rig rii ril rir rle rlf rlg rli rll rlr rrb rrf rrg rri rrl rrr