-er -ol c-- ccc cce ccf cck ccl cco ccr ccs cct ce- cec cee cef cek cel ceo cer ces cet cfc cfe cff cfk cfl cfo cfr cfs cft ckc cko cks ckt cl- clc cle clf clk cll clo clr cls clt co- coc coe cof cok col coo cor cos cot crc cre crf crk crl cro crr crs crt csc cse csf csk csl cso csr css cst ctc cte ctf ctk ctl cto ctr cts ctt ec- ecc ece ecf eck ecl eco ecr ecs ect eec eee eef eek eel eeo eer ees eet ef- efc efe eff efl efo efr efs eft ekc eke ekf ekl eko ekr eks ekt elc ele elf elk ell elo elr els elt eo- eoc eoe eof eok eol eoo eor eos eot erc ere erf erk erl ero err ers ert es- esc ese esf esk esl eso esr ess est etc ete etf etk etl eto etr ets ett fcc fce fcf fck fcl fco fcr fcs fct fec fee fef fek fel feo fer fes fet ffc ffe fff ffk ffl ffo ffr ffs fft fkc fkf fkk fkl fkt flc fle flf fll flo flr fls flt foc foe fof fok fol foo for fos fot frc fre frf frk frl fro frr frs frt fsc fse fsf fsk fsl fso fsr fss fst ftc fte ftf ftk ftl fto ftr fts ftt k-t kcc kce kck kcl kcr kcs kct ke- kec kee kef kek kel keo ker kes ket kfc kff kfo kfs kkc kke kkk kkl kkr kks kkt kl- klc klf klo klr kls klt koc koe kof kok kol koo kor kos kot krc krf krk krl kro krr krs krt ksc kse ksf ksk ksl kso ksr kss kst ktc kte ktf ktk ktl kto ktr kts ktt lcc lce lcf lck lcl lco lcr lcs lct lec lee lef lek lel leo ler les let lfc lfe lff lfk lfl lfo lfr lfs lft lkl lkr lks lkt llc lle llf llk lll llo llr lls llt loc loe lof lok lol loo lor los lot lrc lrf lrk lro lrr lrs lrt lsc lse lsf lsk lsl lso lsr lss lst ltc lte ltf ltk ltl lto ltr lts ltt oc- occ ocf ock ocl oco ocr ocs oct oec oee oef oel oeo oer oes oet of- ofc ofe off ofl ofo ofr ofs oft okc oke okk okl oko okr oks olc ole olf olk oll olo ols olt oo- ooc oof ook ool ooo oor oos oot or- orc ore orf ork orl oro orr ors ort os- osc ose osf osk osl oso osr oss ost ot- otc ote otf otk otl oto otr ots ott rcc rce rcf rcl rco rcr rcs rct re- rec ree ref rek rel reo rer res ret rfc rfe rff rfk rfl rfo rfr rfs rft rkc rke rkf rkk rko rks rkt rlc rle rlf rll rlo rlr rls rlt roc roe rof rok rol roo ror ros rot rrc rrf rrk rrl rrr rrs rrt rsc rse rsf rsk rsl rso rsr rss rst rtc rte rtf rtk rtl rto rtr rts rtt scc sce scf sck scl sco scr scs sct se- sec see sef sek sel seo ser ses set sfc sfe sff sfk sfl sfo sfr sfs sft sk- skc ske skf skk skl sko skr sks skt slc sle slf slk sll slo slr sls slt soc soe sof sok sol soo sor sos sot sr- src sre srf srk srl sro srr srs srt ss- ssc sse ssf ssk ssl sso ssr sss sst stc ste stf stk stl sto str sts stt tcc tce tcf tck tcl tco tcr tcs tct te- tec tee tef tek tel teo ter tes tet tfc tfe tff tfk tfl tfo tfr tfs tft tkc tke tkk tkl tko tkr tks tkt tlc tle tlf tlk tll tlo tlr tls tlt to- toc toe tof tok tol too tor tos tot trc tre trf trk trl tro trr trs trt tsc tse tsf tsk tsl tso tsr tss tst ttc tte ttf ttk ttl tto ttr tts ttt