-er c-- ccc cce ccl ccn ccr ccv ce- cec cee cel cen cer cev cl- clc cle cll cln clr clv cn- cnc cne cnl cnn cnr cnv crc cre crl crn crr crv cvc cve cvl cvn cvr cvv ec- ecc ece ecl ecn ecr ecv eec eee eel een eer eev elc ele ell eln elr elv en- enc ene enl enn enr env erc ere erl ern err erv evc eve evl evn evr evv lcc lce lcl lcn lcr lcv lec lee lel len ler lev llc lle lll lln llr llv lnc lne lnl lnn lnr lrc lrn lrr lrv lvc lve lvl lvn lvr lvv ncc nce ncl ncn ncr ncv ne- nec nee nel nen ner nev nlc nle nll nln nlr nlv nnc nne nnl nnn nnv nrc nre nrl nrn nrr nrv nvc nve nvl nvn nvv rcc rce rcl rcn rcr rcv re- rec ree rel ren rer rev rlc rle rll rln rlr rnc rnn rnr rnv rrc rrl rrn rrr rvc rve rvl rvn rvr rvv v-e vcc vce vcl vcn vcr vec vee vel ven ver vl- vlc vle vll vlv vn- vnl vnr vnv vrc vre vrn vrr vvc vvr vvv