-er -ol c-- ccc cce ccl cco ccr ccs cct ce- cec cee cel ceo cer ces cet cl- clc cle cll clo clr cls clt co- coc coe col coo cor cos cot crc cre crl cro crr crs crt csc cse csl cso csr css cst ctc cte ctl cto ctr cts ctt ec- ecc ece ecl eco ecr ecs ect eec eee eel eeo eer ees eet elc ele ell elo elr els elt eo- eoc eoe eol eoo eor eos eot erc ere erl ero err ers ert es- esc ese esl eso esr ess est etc ete etl eto etr ets ett lcc lce lcl lco lcr lcs lct lec lee lel leo ler les let llc lle lll llo llr lls llt loc loe lol loo lor los lot lrc lro lrr lrs lrt lsc lse lsl lso lsr lss lst ltc lte ltl lto ltr lts ltt oc- occ ocl oco ocr ocs oct oec oee oel oeo oer oes oet olc ole oll olo ols olt oo- ooc ool ooo oor oos oot or- orc ore orl oro orr ors ort os- osc ose osl oso osr oss ost ot- otc ote otl oto otr ots ott rcc rce rcl rco rcr rcs rct re- rec ree rel reo rer res ret rlc rle rll rlo rlr rls rlt roc roe rol roo ror ros rot rrc rrl rrr rrs rrt rsc rse rsl rso rsr rss rst rtc rte rtl rto rtr rts rtt scc sce scl sco scr scs sct se- sec see sel seo ser ses set slc sle sll slo slr sls slt soc soe sol soo sor sos sot sr- src sre srl sro srr srs srt ss- ssc sse ssl sso ssr sss sst stc ste stl sto str sts stt tcc tce tcl tco tcr tcs tct te- tec tee tel teo ter tes tet tlc tle tll tlo tlr tls tlt to- toc toe tol too tor tos tot trc tre trl tro trr trs trt tsc tse tsl tso tsr tss tst ttc tte ttl tto ttr tts ttt