bbb bbe bbf bbi bbl be- beb bee bef bei bel bfb bfe bff bfi bfl bi- bib bie bif bii bil blb ble blf bli bll ebb ebe ebf ebi ebl eeb eee eef eel ef- efb efe eff efi efl eib eie eif eii eil elb ele elf eli ell fbb fbe fbf fbi fbl feb fee fef fei fel ffe fff ffi ffl fib fie fif fii fil flb fle flf fli fll i-f ibb ibe ibf ibi ibl ie- iee ief iei iel ifb ife iff ifi ifl iib iie iif iii iil il- ilb ile ilf ili ill lbb lbe lbf lbi lbl leb lee lef lei lel lfb lfe lff lfi lfl lib lie lif lii lil llb lle llf lli lll