-er -ol c-- ccc cce ccl cco ccp ccr ccs ce- cec cee cel ceo cep cer ces cl- clc cle cll clo clp clr cls co- coc coe col coo cop cor cos cpc cpe cpl cpo cpp cpr cps crc cre crl cro crp crr crs csc cse csl cso csp csr css ec- ecc ece ecl eco ecr ecs eec eee eel eeo eep eer ees elc ele ell elo elp elr els eo- eoc eoe eol eoo eop eor eos ep- epc epe epl epo epp epr eps erc ere erl ero erp err ers es- esc ese esl eso esp esr ess l-p lcc lce lcl lco lcp lcr lcs lec lee lel leo lep ler les llc lle lll llo llp llr lls loc loe lol loo lop lor los lpc lpe lpl lpo lpp lpr lps lrc lro lrp lrr lrs lsc lse lsl lso lsp lsr lss oc- occ ocl oco ocp ocr ocs oec oee oel oeo oep oer oes olc ole oll olo olp ols oo- ooc ool ooo oop oor oos op- opc ope opl opo opp opr ops or- orc ore orl oro orp orr ors os- osc ose osl oso osp osr oss p-p pcc pce pcl pco pcp pcr pcs pec pee pel peo pep per pes plc ple pll plo plp plr pls poc poe pol poo pop por pos ppc ppe ppl ppo ppp ppr pps prc pre prl pro prp prr prs ps- psc pse psl pso psp psr pss rcc rce rcl rco rcp rcr rcs re- rec ree rel reo rep rer res rlc rle rll rlo rlp rlr rls roc roe rol roo rop ror ros rpc rpe rpl rpo rpp rpr rps rrc rrl rrp rrr rrs rsc rse rsl rso rsp rsr rss scc sce scl sco scp scr scs se- sec see sel seo sep ser ses slc sle sll slo slp slr sls soc soe sol soo sop sor sos spc spe spl spo spp spr sps sr- src sre srl sro srp srr srs ss- ssc sse ssl sso ssp ssr sss