-er c-- ccc cce ccg cck ccn cco ccr ccs cct ce- cec cee ceg cek cen ceo cer ces cet cgc cge cgg cgn cgo cgr cgs cgt ckc cko cks ckt cn- cnc cne cng cnn cno cnr cns cnt co- coc coe cog cok con coo cor cos cot crc cre crg crk crn cro crr crs crt csc cse csg csk csn cso csr css cst ctc cte ctg ctk ctn cto ctr cts ctt ec- ecc ece ecg eck ecn eco ecr ecs ect eec eee eeg eek een eeo eer ees eet egc ege egg egn ego egr egs egt ekc eke ekg eko ekr eks ekt en- enc ene eng enk enn eno enr ens ent eo- eoc eoe eog eok eon eoo eor eos eot erc ere erg erk ern ero err ers ert es- esc ese esg esk esn eso esr ess est etc ete etg etk etn eto etr ets ett gcc gce gcg gck gcn gco gcr gcs gct ge- gec gee geg gek gen geo ger ges get ggc ggg ggn ggo ggr ggs ggt gkn gko gks gkt gnc gne gnn gno gnr gns gnt goc goe gog gok gon goo gor gos got grc gre grg grk grn gro grr grs grt gsc gse gsg gsk gsn gso gsr gss gst gtc gte gtg gtk gtn gto gtr gts gtt k-t kcc kce kcg kck kcn kcr kcs kct ke- kec kee keg kek ken keo ker kes ket kgc kgo kgs kkc kke kkk kkn kkr kks kkt kn- knc kne kng knk knn kno knr knt koc koe kog kok kon koo kor kos kot krc krg krk krn kro krr krs krt ksc kse ksg ksk ksn kso ksr kss kst ktc kte ktg ktk ktn kto ktr kts ktt ncc nce ncg nck ncn nco ncr ncs nct ne- nec nee neg nek nen neo ner nes net ngc nge ngg ngk ngn ngo ngs ngt nkc nke nkk nkn nko nkr nks nkt nnc nne nng nnk nnn nno nns nnt no- noc noe nog nok non noo nor nos not nrc nre nrg nrk nrn nro nrr nrs nrt nsc nse nsg nsk nsn nso nsr nss nst ntc nte ntg ntk ntn nto ntr nts ntt oc- occ ocg ock ocn oco ocr ocs oct oec oee oeg oen oeo oer oes oet ogc oge ogg ogn ogo ogs ogt okc oke okg okk oko okr oks on- onc one ong onk onn ono onr ons ont oo- ooc oog ook oon ooo oor oos oot or- orc ore org ork orn oro orr ors ort os- osc ose osg osk osn oso osr oss ost ot- otc ote otg otk otn oto otr ots ott rcc rce rcg rcn rco rcr rcs rct re- rec ree reg rek ren reo rer res ret rgc rge rgg rgk rgn rgo rgr rgs rgt rkc rke rkg rkk rko rks rkt rnc rng rnn rno rnr rns rnt roc roe rog rok ron roo ror ros rot rrc rrg rrk rrn rrr rrs rrt rsc rse rsg rsk rsn rso rsr rss rst rtc rte rtg rtk rtn rto rtr rts rtt scc sce scg sck scn sco scr scs sct se- sec see seg sek sen seo ser ses set sgc sge sgg sgk sgn sgo sgr sgs sgt sk- skc ske skg skk sko skr sks skt snc sne sng snk snn sno snr sns snt soc soe sog sok son soo sor sos sot sr- src sre srg srk srn sro srr srs srt ss- ssc sse ssg ssk ssn sso ssr sss sst stc ste stg stk stn sto str sts stt tcc tce tcg tck tcn tco tcr tcs tct te- tec tee teg tek ten teo ter tes tet tgc tge tgg tgk tgn tgo tgr tgs tgt tkc tke tkg tkk tko tkr tks tkt tnc tne tng tnk tnn tno tnr tns tnt to- toc toe tog tok ton too tor tos tot trc tre trg trk trn tro trr trs trt tsc tse tsg tsk tsn tso tsr tss tst ttc tte ttg ttk ttn tto ttr tts ttt