-er c-- ccc cce ccg ccr ccs cct ccu ce- cec cee ceg cer ces cet ceu cgc cge cgg cgr cgs cgt cgu crc cre crg crr crs crt cru csc cse csg csr css cst csu ctc cte ctg ctr cts ctt ctu cuc cue cug cur cus cut cuu ec- ecc ece ecg ecr ecs ect ecu eec eee eeg eer ees eet egc ege egg egr egs egt egu erc ere erg err ers ert eru es- esc ese esg esr ess est esu etc ete etg etr ets ett etu eu- euc eue eug eur eus eut gcc gce gcg gcr gcs gct gcu ge- gec gee geg ger ges get geu ggc ggg ggr ggs ggt ggu grc gre grg grr grs grt gru gsc gse gsg gsr gss gst gsu gtc gte gtg gtr gts gtt gtu gu- guc gue gug gur gus gut guu rcc rce rcg rcr rcs rct rcu re- rec ree reg rer res ret reu rgc rge rgg rgr rgs rgt rrc rrg rrr rrs rrt rru rsc rse rsg rsr rss rst rsu rtc rte rtg rtr rts rtt rtu ruc rue rug rur rus rut ruu scc sce scg scr scs sct scu se- sec see seg ser ses set seu sgc sge sgg sgr sgs sgt sgu sr- src sre srg srr srs srt ss- ssc sse ssg ssr sss sst ssu stc ste stg str sts stt stu suc sue sug sur sus sut suu tcc tce tcg tcr tcs tct tcu te- tec tee teg ter tes tet teu tgc tge tgg tgr tgs tgt tgu trc tre trg trr trs trt tru tsc tse tsg tsr tss tst tsu ttc tte ttg ttr tts ttt ttu tuc tue tug tur tus tut tuu ucc uce ucg ucr ucs uct ucu uec uee ueg uer ues uet ugc uge ugg ugr ugs ugt ugu ur- urc ure urg urr urs urt uru usc use usg usr uss ust usu utc ute utr uts utt utu uuc uue uug uur uus uut uuu