-er -ol c-- ccc cce ccf ccl cco ccr ccs cct ce- cec cee cef cel ceo cer ces cet cfc cfe cff cfl cfo cfr cfs cft cl- clc cle clf cll clo clr cls clt co- coc coe cof col coo cor cos cot crc cre crf crl cro crr crs crt csc cse csf csl cso csr css cst ctc cte ctf ctl cto ctr cts ctt ec- ecc ece ecf ecl eco ecr ecs ect eec eee eef eel eeo eer ees eet ef- efc efe eff efl efo efr efs eft elc ele elf ell elo elr els elt eo- eoc eoe eof eol eoo eor eos eot erc ere erf erl ero err ers ert es- esc ese esf esl eso esr ess est etc ete etf etl eto etr ets ett fcc fce fcf fcl fco fcr fcs fct fec fee fef fel feo fer fes fet ffc ffe fff ffl ffo ffr ffs fft flc fle flf fll flo flr fls flt foc foe fof fol foo for fos fot frc fre frf frl fro frr frs frt fsc fse fsf fsl fso fsr fss fst ftc fte ftf ftl fto ftr fts ftt lcc lce lcf lcl lco lcr lcs lct lec lee lef lel leo ler les let lfc lfe lff lfl lfo lfr lfs lft llc lle llf lll llo llr lls llt loc loe lof lol loo lor los lot lrc lrf lro lrr lrs lrt lsc lse lsf lsl lso lsr lss lst ltc lte ltf ltl lto ltr lts ltt oc- occ ocf ocl oco ocr ocs oct oec oee oef oel oeo oer oes oet of- ofc ofe off ofl ofo ofr ofs oft olc ole olf oll olo ols olt oo- ooc oof ool ooo oor oos oot or- orc ore orf orl oro orr ors ort os- osc ose osf osl oso osr oss ost ot- otc ote otf otl oto otr ots ott rcc rce rcf rcl rco rcr rcs rct re- rec ree ref rel reo rer res ret rfc rfe rff rfl rfo rfr rfs rft rlc rle rlf rll rlo rlr rls rlt roc roe rof rol roo ror ros rot rrc rrf rrl rrr rrs rrt rsc rse rsf rsl rso rsr rss rst rtc rte rtf rtl rto rtr rts rtt scc sce scf scl sco scr scs sct se- sec see sef sel seo ser ses set sfc sfe sff sfl sfo sfr sfs sft slc sle slf sll slo slr sls slt soc soe sof sol soo sor sos sot sr- src sre srf srl sro srr srs srt ss- ssc sse ssf ssl sso ssr sss sst stc ste stf stl sto str sts stt tcc tce tcf tcl tco tcr tcs tct te- tec tee tef tel teo ter tes tet tfc tfe tff tfl tfo tfr tfs tft tlc tle tlf tll tlo tlr tls tlt to- toc toe tof tol too tor tos tot trc tre trf trl tro trr trs trt tsc tse tsf tsl tso tsr tss tst ttc tte ttf ttl tto ttr tts ttt