-er bbb bbe bbf bbi bbk bbl bbr be- beb bee bef bei bek bel ber bfb bfe bff bfi bfl bfr bi- bib bie bif bii bik bil bir bkb bke bkf bkk bkl bkr blb ble blf bli blk bll blr brb bre brf bri brk brl brr ebb ebe ebf ebi ebk ebl ebr eeb eee eef eek eel eer ef- efb efe eff efi efl efr eib eie eif eii eik eil eir ekb eke ekf eki ekl ekr elb ele elf eli elk ell elr erb ere erf eri erk erl err fbb fbe fbf fbi fbk fbl fbr feb fee fef fei fek fel fer ffe fff ffi ffk ffl ffr fib fie fif fii fik fil fir fkb fkf fki fkk fkl flb fle flf fli fll flr frb fre frf fri frk frl frr i-f ibb ibe ibf ibi ibk ibl ibr ie- iee ief iei iek iel ier ifb ife iff ifi ifl ifr iib iie iif iii iil iir ikb ike ikf iki ikk ikl ikr il- ilb ile ilf ili ilk ill ilr ir- irb ire irf iri irk irl irr kbb kbe kbf kbi kbk kbl kbr ke- keb kee kef kei kek kel ker kff kfi kib kie kif kii kik kil kir kkb kke kki kkk kkl kkr kl- klb klf kli klr krf kri krk krl krr lbb lbe lbf lbi lbk lbl lbr leb lee lef lei lek lel ler lfb lfe lff lfi lfk lfl lfr lib lie lif lii lik lil lir lkb lkl lkr llb lle llf lli llk lll llr lrb lrf lri lrk lrr rbb rbe rbf rbi rbk rbl rbr re- reb ree ref rei rek rel rer rfb rfe rff rfi rfk rfl rfr rib rie rif rii rik ril rir rkb rke rkf rkk rle rlf rli rll rlr rrb rrf rri rrk rrl rrr