-er c-- ccc cce ccf cck ccl ccn ccr ce- cec cee cef cek cel cen cer cfc cfe cff cfk cfl cfn cfr ckc cl- clc cle clf clk cll cln clr cn- cnc cne cnf cnl cnn cnr crc cre crf crk crl crn crr ec- ecc ece ecf eck ecl ecn ecr eec eee eef eek eel een eer ef- efc efe eff efl efr ekc eke ekf ekl ekr elc ele elf elk ell eln elr en- enc ene enf enk enl enn enr erc ere erf erk erl ern err fcc fce fcf fck fcl fcn fcr fec fee fef fek fel fen fer ffc ffe fff ffk ffl ffn ffr fkc fkf fkk fkl flc fle flf fll fln flr fnc fne fnf fnk fnl fnn fnr frc fre frf frk frl frn frr kcc kce kck kcl kcn kcr ke- kec kee kef kek kel ken ker kfc kff kkc kke kkk kkl kkn kkr kl- klc klf klr kn- knc kne knf knk knl knn knr krc krf krk krl krn krr lcc lce lcf lck lcl lcn lcr lec lee lef lek lel len ler lfc lfe lff lfk lfl lfn lfr lkl lkr llc lle llf llk lll lln llr lnc lne lnk lnl lnn lnr lrc lrf lrk lrn lrr ncc nce ncf nck ncl ncn ncr ne- nec nee nef nek nel nen ner nfc nfe nff nfk nfl nfn nfr nkc nke nkf nkk nkn nkr nlc nle nlf nlk nll nln nlr nnc nne nnf nnk nnl nnn nrc nre nrf nrk nrl nrn nrr rcc rce rcf rcl rcn rcr re- rec ree ref rek rel ren rer rfc rfe rff rfk rfl rfn rfr rkc rke rkf rkk rlc rle rlf rll rln rlr rnc rnn rnr rrc rrf rrk rrl rrn rrr