-er -ic bbb bbc bbe bbf bbi bbl bbr bcb bcc bce bcf bci bcl bcr be- beb bec bee bef bei bel ber bfb bfc bfe bff bfi bfl bfr bi- bib bic bie bif bii bil bir blb blc ble blf bli bll blr brb bre brf bri brl brr c-- cbb cbc cbe cbf cbi cbl cbr ccb ccc cce ccf cci ccl ccr ce- ceb cec cee cef cei cel cer cfb cfc cfe cff cfi cfl cfr ci- cib cic cie cif cii cil cir cl- clb clc cle clf cli cll clr crb crc cre crf cri crl crr ebb ebc ebe ebf ebi ebl ebr ec- ecb ecc ece ecf eci ecl ecr eeb eec eee eef eel eer ef- efb efc efe eff efi efl efr eib eic eie eif eii eil eir elb elc ele elf eli ell elr erb erc ere erf eri erl err fbb fbc fbe fbf fbi fbl fbr fcb fcc fce fcf fci fcl fcr feb fec fee fef fei fel fer ffc ffe fff ffi ffl ffr fib fic fie fif fii fil fir flb flc fle flf fli fll flr frb frc fre frf fri frl frr i-f ibb ibc ibe ibf ibi ibl ibr icb icc ice icf ici icl icr ie- iec iee ief iei iel ier ifb ifc ife iff ifi ifl ifr iib iic iie iif iii iil iir il- ilb ilc ile ilf ili ill ilr ir- irb irc ire irf iri irl irr lbb lbc lbe lbf lbi lbl lbr lcb lcc lce lcf lci lcl lcr leb lec lee lef lei lel ler lfb lfc lfe lff lfi lfl lfr lib lic lie lif lii lil lir llb llc lle llf lli lll llr lrb lrc lrf lri lrr rbb rbc rbe rbf rbi rbl rbr rcb rcc rce rcf rci rcl rcr re- reb rec ree ref rei rel rer rfb rfc rfe rff rfi rfl rfr rib ric rie rif rii ril rir rlc rle rlf rli rll rlr rrb rrc rrf rri rrl rrr