-er c-- ccc cce ccl ccn ccr ce- cec cee cel cen cer cl- clc cle cll cln clr cn- cnc cne cnl cnn cnr crc cre crl crn crr ec- ecc ece ecl ecn ecr eec eee eel een eer elc ele ell eln elr en- enc ene enl enn enr erc ere erl ern err lcc lce lcl lcn lcr lec lee lel len ler llc lle lll lln llr lnc lne lnl lnn lnr lrc lrn lrr ncc nce ncl ncn ncr ne- nec nee nel nen ner nlc nle nll nln nlr nnc nne nnl nnn nrc nre nrl nrn nrr rcc rce rcl rcn rcr re- rec ree rel ren rer rlc rle rll rln rlr rnc rnn rnr rrc rrl rrn rrr