-er -ol c-- ccc cce ccl cco ccp ccr ccs cct ce- cec cee cel ceo cep cer ces cet cl- clc cle cll clo clp clr cls clt co- coc coe col coo cop cor cos cot cpc cpe cpl cpo cpp cpr cps cpt crc cre crl cro crp crr crs crt csc cse csl cso csp csr css cst ctc cte ctl cto ctp ctr cts ctt ec- ecc ece ecl eco ecr ecs ect eec eee eel eeo eep eer ees eet elc ele ell elo elp elr els elt eo- eoc eoe eol eoo eop eor eos eot ep- epc epe epl epo epp epr eps ept erc ere erl ero erp err ers ert es- esc ese esl eso esp esr ess est etc ete etl eto etp etr ets ett l-p lcc lce lcl lco lcp lcr lcs lct lec lee lel leo lep ler les let llc lle lll llo llp llr lls llt loc loe lol loo lop lor los lot lpc lpe lpl lpo lpp lpr lps lpt lrc lro lrp lrr lrs lrt lsc lse lsl lso lsp lsr lss lst ltc lte ltl lto ltp ltr lts ltt oc- occ ocl oco ocp ocr ocs oct oec oee oel oeo oep oer oes oet olc ole oll olo olp ols olt oo- ooc ool ooo oop oor oos oot op- opc ope opl opo opp opr ops opt or- orc ore orl oro orp orr ors ort os- osc ose osl oso osp osr oss ost ot- otc ote otl oto otp otr ots ott p-p pcc pce pcl pco pcp pcr pcs pct pec pee pel peo pep per pes pet plc ple pll plo plp plr pls plt poc poe pol poo pop por pos pot ppc ppe ppl ppo ppp ppr pps ppt prc pre prl pro prp prr prs prt ps- psc pse psl pso psp psr pss pst pt- ptc pte ptl pto ptp ptr pts ptt rcc rce rcl rco rcp rcr rcs rct re- rec ree rel reo rep rer res ret rlc rle rll rlo rlp rlr rls rlt roc roe rol roo rop ror ros rot rpc rpe rpl rpo rpp rpr rps rpt rrc rrl rrp rrr rrs rrt rsc rse rsl rso rsp rsr rss rst rtc rte rtl rto rtp rtr rts rtt scc sce scl sco scp scr scs sct se- sec see sel seo sep ser ses set slc sle sll slo slp slr sls slt soc soe sol soo sop sor sos sot spc spe spl spo spp spr sps spt sr- src sre srl sro srp srr srs srt ss- ssc sse ssl sso ssp ssr sss sst stc ste stl sto stp str sts stt tcc tce tcl tco tcp tcr tcs tct te- tec tee tel teo tep ter tes tet tlc tle tll tlo tlp tlr tls tlt to- toc toe tol too top tor tos tot tpc tpe tpl tpo tpp tpr tps tpt trc tre trl tro trp trr trs trt tsc tse tsl tso tsp tsr tss tst ttc tte ttl tto ttp ttr tts ttt