-er c-- ccc cce cck ccm cco ccr ccs cct ce- cec cee cek cem ceo cer ces cet ckc ckm cko cks ckt cmc cme cmk cmm cmo cmr cms cmt co- coc coe cok com coo cor cos cot crc cre crk crm cro crr crs crt csc cse csk csm cso csr css cst ctc cte ctk ctm cto ctr cts ctt ec- ecc ece eck ecm eco ecr ecs ect eec eee eek eem eeo eer ees eet ekc eke eko ekr eks ekt em- emc eme emk emm emo emr ems emt eo- eoc eoe eok eom eoo eor eos eot erc ere erk erm ero err ers ert es- esc ese esk esm eso esr ess est etc ete etk etm eto etr ets ett k-t kcc kce kck kcm kcr kcs kct ke- kec kee kek kem keo ker kes ket kkc kke kkk kkm kkr kks kkt kmc kme kmk kmm kmo kms kmt koc koe kok kom koo kor kos kot krc krk kro krr krs krt ksc kse ksk ksm kso ksr kss kst ktc kte ktk ktm kto ktr kts ktt m-o m-r mc- mcc mce mck mcm mco mcr mcs mct mec mee mek mem meo mer mes met mkc mke mkk mkm mko mkr mks mkt mmc mme mmk mmm mmo mmr mms mmt moc moe mok mom moo mor mos mot mrc mre mrk mrm mro mrr mrs mrt msc mse msk msm mso msr mss mst mtc mte mtk mtm mto mtr mts mtt oc- occ ock ocm oco ocr ocs oct oec oee oem oeo oer oes oet okc oke okk oko okr oks om- omc ome omm omo omr oms omt oo- ooc ook oom ooo oor oos oot or- orc ore ork orm oro orr ors ort os- osc ose osk osm oso osr oss ost ot- otc ote otk otm oto otr ots ott rcc rce rcm rco rcr rcs rct re- rec ree rek rem reo rer res ret rkc rke rkk rkm rko rks rkt rmc rme rmm rmo rmr rms rmt roc roe rok rom roo ror ros rot rrc rrk rrm rrr rrs rrt rsc rse rsk rsm rso rsr rss rst rtc rte rtk rtm rto rtr rts rtt scc sce sck scm sco scr scs sct se- sec see sek sem seo ser ses set sk- skc ske skk skm sko skr sks skt smc sme smk smm smo smr sms smt soc soe sok som soo sor sos sot sr- src sre srk srm sro srr srs srt ss- ssc sse ssk ssm sso ssr sss sst stc ste stk stm sto str sts stt tcc tce tck tcm tco tcr tcs tct te- tec tee tek tem teo ter tes tet tkc tke tkk tkm tko tkr tks tkt tmc tme tmk tmm tmo tmr tms tmt to- toc toe tok tom too tor tos tot trc tre trk trm tro trr trs trt tsc tse tsk tsm tso tsr tss tst ttc tte ttk ttm tto ttr tts ttt