-er bbb bbe bbf bbi bbl bbr be- beb bee bef bei bel ber bfb bfe bff bfi bfl bfr bi- bib bie bif bii bil bir blb ble blf bli bll blr brb bre brf bri brl brr ebb ebe ebf ebi ebl ebr eeb eee eef eel eer ef- efb efe eff efi efl efr eib eie eif eii eil eir elb ele elf eli ell elr erb ere erf eri erl err fbb fbe fbf fbi fbl fbr feb fee fef fei fel fer ffe fff ffi ffl ffr fib fie fif fii fil fir flb fle flf fli fll flr frb fre frf fri frl frr i-f ibb ibe ibf ibi ibl ibr ie- iee ief iei iel ier ifb ife iff ifi ifl ifr iib iie iif iii iil iir il- ilb ile ilf ili ill ilr ir- irb ire irf iri irl irr lbb lbe lbf lbi lbl lbr leb lee lef lei lel ler lfb lfe lff lfi lfl lfr lib lie lif lii lil lir llb lle llf lli lll llr lrb lrf lri lrr rbb rbe rbf rbi rbl rbr re- reb ree ref rei rel rer rfb rfe rff rfi rfl rfr rib rie rif rii ril rir rle rlf rli rll rlr rrb rrf rri rrl rrr