-er -ol c-- ccc cce ccl cco ccr ccs ccv ce- cec cee cel ceo cer ces cev cl- clc cle cll clo clr cls clv co- coc coe col coo cor cos cov crc cre crl cro crr crs crv csc cse csl cso csr css csv cvc cve cvl cvo cvr cvs cvv ec- ecc ece ecl eco ecr ecs ecv eec eee eel eeo eer ees eev elc ele ell elo elr els elv eo- eoc eoe eol eoo eor eos erc ere erl ero err ers erv es- esc ese esl eso esr ess esv evc eve evl evo evr evs evv lcc lce lcl lco lcr lcs lcv lec lee lel leo ler les lev llc lle lll llo llr lls llv loc loe lol loo lor los lov lrc lro lrr lrs lrv lsc lse lsl lso lsr lss lsv lvc lve lvl lvr lvs lvv oc- occ ocl oco ocr ocs ocv oec oee oel oeo oer oes olc ole oll olo ols oo- ooc ool ooo oor oos oov or- orc ore orl oro orr ors orv os- osc ose osl oso osr oss osv ov- ovc ove ovl ovo ovs ovv rcc rce rcl rco rcr rcs rcv re- rec ree rel reo rer res rev rlc rle rll rlo rlr rls roc roe rol roo ror ros rov rrc rrl rrr rrs rsc rse rsl rso rsr rss rsv rvc rve rvl rvo rvr rvs rvv scc sce scl sco scr scs scv se- sec see sel seo ser ses sev slc sle sll slo slr sls slv soc soe sol soo sor sos sov sr- src sre srl sro srr srs srv ss- ssc sse ssl sso ssr sss ssv svc sve svl svo svr svs svv v-e vcc vce vcl vco vcr vcs vec vee vel veo ver ves vl- vlc vle vll vlo vls vlv voc voe vol voo vor vos vov vrc vre vrr vrs vsc vse vsl vso vsr vss vsv vvc vvo vvr vvs vvv