-er c-- ccc cce ccl ccn ccr cct ce- cec cee cel cen cer cet cl- clc cle cll cln clr clt cn- cnc cne cnl cnn cnr cnt crc cre crl crn crr crt ctc cte ctl ctn ctr ctt ec- ecc ece ecl ecn ecr ect eec eee eel een eer eet elc ele ell eln elr elt en- enc ene enl enn enr ent erc ere erl ern err ert etc ete etl etn etr ett lcc lce lcl lcn lcr lct lec lee lel len ler let llc lle lll lln llr llt lnc lne lnl lnn lnr lnt lrc lrn lrr lrt ltc lte ltl ltr ltt ncc nce ncl ncn ncr nct ne- nec nee nel nen ner net nlc nle nll nln nlr nlt nnc nne nnl nnn nnt nrc nre nrl nrn nrr nrt ntc nte ntn ntr ntt rcc rce rcl rcn rcr rct re- rec ree rel ren rer ret rlc rle rll rln rlr rlt rnc rnn rnr rnt rrc rrl rrn rrr rrt rtc rte rtl rtn rtr rtt tcc tce tcl tcn tcr tct te- tec tee tel ten ter tet tlc tle tll tln tlr tlt tnc tne tnl tnn tnr tnt trc tre trl trn trr trt ttc tte ttl ttn ttr ttt