-er -ol c-- ccc cce cck ccl ccm cco ccr ce- cec cee cek cel cem ceo cer ckc ckm cko cl- clc cle clk cll clm clo clr cmc cme cmk cml cmm cmo cmr co- coc coe cok col com coo cor crc cre crk crl crm cro crr ec- ecc ece eck ecl ecm eco ecr eec eee eek eel eem eeo eer ekc eke ekl eko ekr elc ele elk ell elm elo elr em- emc eme emk eml emm emo emr eo- eoc eoe eok eol eom eoo eor erc ere erk erl erm ero err kcc kce kck kcl kcm kcr ke- kec kee kek kel kem keo ker kkc kke kkk kkl kkm kkr kl- klc klm klo klr kmc kme kmk kml kmm kmo koc koe kok kol kom koo kor krc krk krl kro krr lcc lce lck lcl lcm lco lcr lec lee lek lel lem leo ler lkl lkr llc lle llk lll llm llo llr lmc lme lmk lml lmm lmo lmr loc loe lok lol lom loo lor lrc lrk lrm lro lrr m-o m-r mc- mcc mce mck mcl mcm mco mcr mec mee mek mel mem meo mer mkc mke mkk mkl mkm mko mkr mlc mle mlk mll mlm mlo mlr mmc mme mmk mml mmm mmo mmr moc moe mok mol mom moo mor mrc mre mrk mrl mrm mro mrr oc- occ ock ocl ocm oco ocr oec oee oel oem oeo oer okc oke okk okl oko okr olc ole olk oll olm olo om- omc ome oml omm omo omr oo- ooc ook ool oom ooo oor or- orc ore ork orl orm oro orr rcc rce rcl rcm rco rcr re- rec ree rek rel rem reo rer rkc rke rkk rkm rko rlc rle rll rlm rlo rlr rmc rme rml rmm rmo rmr roc roe rok rol rom roo ror rrc rrk rrl rrm rrr