-er c-- ccc cce ccf ccl ccn ccr ccs ce- cec cee cef cel cen cer ces cfc cfe cff cfl cfn cfr cfs cl- clc cle clf cll cln clr cls cn- cnc cne cnf cnl cnn cnr cns crc cre crf crl crn crr crs csc cse csf csl csn csr css ec- ecc ece ecf ecl ecn ecr ecs eec eee eef eel een eer ees ef- efc efe eff efl efr efs elc ele elf ell eln elr els en- enc ene enf enl enn enr ens erc ere erf erl ern err ers es- esc ese esf esl esn esr ess fcc fce fcf fcl fcn fcr fcs fec fee fef fel fen fer fes ffc ffe fff ffl ffn ffr ffs flc fle flf fll fln flr fls fnc fne fnf fnl fnn fnr fns frc fre frf frl frn frr frs fsc fse fsf fsl fsn fsr fss lcc lce lcf lcl lcn lcr lcs lec lee lef lel len ler les lfc lfe lff lfl lfn lfr lfs llc lle llf lll lln llr lls lnc lne lnl lnn lnr lns lrc lrf lrn lrr lrs lsc lse lsf lsl lsn lsr lss ncc nce ncf ncl ncn ncr ncs ne- nec nee nef nel nen ner nes nfc nfe nff nfl nfn nfr nfs nlc nle nlf nll nln nlr nls nnc nne nnf nnl nnn nns nrc nre nrf nrl nrn nrr nrs nsc nse nsf nsl nsn nsr nss rcc rce rcf rcl rcn rcr rcs re- rec ree ref rel ren rer res rfc rfe rff rfl rfn rfr rfs rlc rle rlf rll rln rlr rls rnc rnn rnr rns rrc rrf rrl rrn rrr rrs rsc rse rsf rsl rsn rsr rss scc sce scf scl scn scr scs se- sec see sef sel sen ser ses sfc sfe sff sfl sfn sfr sfs slc sle slf sll sln slr sls snc sne snf snl snn snr sns sr- src sre srf srl srn srr srs ss- ssc sse ssf ssl ssn ssr sss