-er c-- ccc cce ccl ccr ccv ce- cec cee cel cer cev cl- clc cle cll clr clv crc cre crl crr crv cvc cve cvl cvr cvv ec- ecc ece ecl ecr ecv eec eee eel eer eev elc ele ell elr elv erc ere erl err erv evc eve evl evr evv lcc lce lcl lcr lcv lec lee lel ler lev llc lle lll llr llv lrc lrr lrv lvc lve lvl lvr lvv rcc rce rcl rcr rcv re- rec ree rel rer rev rlc rle rll rlr rrc rrl rrr rvc rve rvl rvr rvv v-e vcc vce vcl vcr vec vee vel ver vl- vlc vle vll vlv vrc vre vrr vvc vvr vvv