-er -ol c-- ccc cce ccl cco ccp ccr ccs ccx ce- cec cee cel ceo cep cer ces cex cl- clc cle cll clo clp clr cls clx co- coc coe col coo cop cor cos cox cpc cpe cpl cpo cpp cpr cps cpx crc cre crl cro crp crr crs crx csc cse csl cso csp csr css csx cxc cxl cxo cxp cxr cxs cxx ec- ecc ece ecl eco ecr ecs ecx eec eee eel eeo eep eer ees eex elc ele ell elo elp elr els elx eo- eoc eoe eol eoo eop eor eos ep- epc epe epl epo epp epr eps epx erc ere erl ero erp err ers es- esc ese esl eso esp esr ess esx ex- exc exe exl exo exp exr exs exx l-p lcc lce lcl lco lcp lcr lcs lcx lec lee lel leo lep ler les lex llc lle lll llo llp llr lls loc loe lol loo lop lor los lox lpc lpe lpl lpo lpp lpr lps lpx lrc lro lrp lrr lrs lsc lse lsl lso lsp lsr lss lxc lxo lxr lxx oc- occ ocl oco ocp ocr ocs ocx oec oee oel oeo oep oer oes oex olc ole oll olo olp ols oo- ooc ool ooo oop oor oos oox op- opc ope opl opo opp opr ops opx or- orc ore orl oro orp orr ors orx os- osc ose osl oso osp osr oss osx ox- oxc oxo oxx p-p pcc pce pcl pco pcp pcr pcs pcx pec pee pel peo pep per pes pex plc ple pll plo plp plr pls plx poc poe pol poo pop por pos pox ppc ppe ppl ppo ppp ppr pps ppx prc pre prl pro prp prr prs prx ps- psc pse psl pso psp psr pss psx pxc pxe pxl pxr pxs rcc rce rcl rco rcp rcr rcs rcx re- rec ree rel reo rep rer res rex rlc rle rll rlo rlp rlr rls roc roe rol roo rop ror ros rox rpc rpe rpl rpo rpp rpr rps rpx rrc rrl rrp rrr rrs rsc rse rsl rso rsp rsr rss rsx rxp rxr rxs scc sce scl sco scp scr scs scx se- sec see sel seo sep ser ses sex slc sle sll slo slp slr sls slx soc soe sol soo sop sor sos sox spc spe spl spo spp spr sps spx sr- src sre srl sro srp srr srs srx ss- ssc sse ssl sso ssp ssr sss ssx sxc sxl sxs xcl xcp xcr xcx xee xel xep xer xes xex xlr xls xoc xoo xop xor xos xox xpc xpe xpl xpo xpp xps xrc xrx xsc xsl xsp xss xxl xxo xxp xxx