-er -ic c-- ccc cce ccf cci cck ccl ccr ce- cec cee cef cei cek cel cer cfc cfe cff cfi cfk cfl cfr ci- cic cie cif cii cik cil cir ckc cki cl- clc cle clf cli clk cll clr crc cre crf cri crk crl crr ec- ecc ece ecf eci eck ecl ecr eec eee eef eek eel eer ef- efc efe eff efi efl efr eic eie eif eii eik eil eir ekc eke ekf eki ekl ekr elc ele elf eli elk ell elr erc ere erf eri erk erl err fcc fce fcf fci fck fcl fcr fec fee fef fei fek fel fer ffc ffe fff ffi ffk ffl ffr fic fie fif fii fik fil fir fkc fkf fki fkk fkl flc fle flf fli fll flr frc fre frf fri frk frl frr i-f icc ice icf ici ick icl icr ie- iec iee ief iei iek iel ier ifc ife iff ifi ifl ifr iic iie iif iii iil iir ikc ike ikf iki ikk ikl ikr il- ilc ile ilf ili ilk ill ilr ir- irc ire irf iri irk irl irr kcc kce kci kck kcl kcr ke- kec kee kef kei kek kel ker kfc kff kfi kic kie kif kii kik kil kir kkc kke kki kkk kkl kkr kl- klc klf kli klr krc krf kri krk krl krr lcc lce lcf lci lck lcl lcr lec lee lef lei lek lel ler lfc lfe lff lfi lfk lfl lfr lic lie lif lii lik lil lir lkl lkr llc lle llf lli llk lll llr lrc lrf lri lrk lrr rcc rce rcf rci rcl rcr re- rec ree ref rei rek rel rer rfc rfe rff rfi rfk rfl rfr ric rie rif rii rik ril rir rkc rke rkf rkk rlc rle rlf rli rll rlr rrc rrf rri rrk rrl rrr