-er -ol c-- ccc cce ccl cco ccr ccv ce- cec cee cel ceo cer cev cl- clc cle cll clo clr clv co- coc coe col coo cor cov crc cre crl cro crr crv cvc cve cvl cvo cvr cvv ec- ecc ece ecl eco ecr ecv eec eee eel eeo eer eev elc ele ell elo elr elv eo- eoc eoe eol eoo eor erc ere erl ero err erv evc eve evl evo evr evv lcc lce lcl lco lcr lcv lec lee lel leo ler lev llc lle lll llo llr llv loc loe lol loo lor lov lrc lro lrr lrv lvc lve lvl lvr lvv oc- occ ocl oco ocr ocv oec oee oel oeo oer olc ole oll olo oo- ooc ool ooo oor oov or- orc ore orl oro orr orv ov- ovc ove ovl ovo ovv rcc rce rcl rco rcr rcv re- rec ree rel reo rer rev rlc rle rll rlo rlr roc roe rol roo ror rov rrc rrl rrr rvc rve rvl rvo rvr rvv v-e vcc vce vcl vco vcr vec vee vel veo ver vl- vlc vle vll vlo vlv voc voe vol voo vor vov vrc vre vrr vvc vvo vvr vvv