-er -th a-a a-c a-t aaa aac aae aag aah aak aar aas aat ac- aca acc ace acg ach ack acr acs act aea aec aee aeg aeh aek aer aes aet ag- aga agc age agg agh agk agr ags agt aha ahc ahe ahg ahh ahk ahr ahs aht aka akc ake akg akh akk akr aks ar- ara arc are arg arh ark arr ars art as- asa asc ase asg ash ask asr ass ast at- ata atc ate atg ath atr ats att c-- caa cac cae cag cah cak car cas cat cca ccc cce ccg cch cck ccr ccs cct ce- cea cec cee ceg ceh cek cer ces cet cga cgc cge cgg cgh cgr cgs cgt ch- cha chc che chg chh chk chr chs cht cka ckc ckh cks ckt cra crc cre crg crh crk crr crs crt csa csc cse csg csh csk csr css cst cta ctc cte ctg cth ctk ctr cts ctt eaa eac eae eag eah eak ear eas eat ec- eca ecc ece ecg ech eck ecr ecs ect eea eec eee eeg eek eer ees eet ega egc ege egg egh egr egs egt eha ehc ehe ehg ehh ehr ehs eht eka ekc eke ekg ekh ekr eks ekt era erc ere erg erh erk err ers ert es- esa esc ese esg esh esk esr ess est eta etc ete etg eth etk etr ets ett gaa gac gae gag gah gak gar gas gat gca gcc gce gcg gch gck gcr gcs gct ge- gea gec gee geg geh gek ger ges get gga ggc ggg ggh ggr ggs ggt gha ghc ghe ghg ghh ghr ghs ght gka gkh gks gkt gra grc gre grg grh grk grr grs grt gsa gsc gse gsg gsk gsr gss gst gta gtc gte gtg gth gtk gtr gts gtt haa hac hae hag hah hak har has hat hca hcc hce hcg hch hck hcr hcs hct he- hea hec hee heg heh hek her hes het hga hgc hge hgg hgh hgk hgr hgs hgt hha hhc hhe hhg hhh hhk hhr hhs hht hka hkg hkh hkk hkr hks hkt hr- hra hrc hre hrg hrh hrk hrr hrs hrt hsa hsc hse hsg hsh hsk hsr hss hst hta htc hte htg hth htk htr hts htt k-t ka- kaa kac kae kag kah kak kar kas kat kca kcc kce kcg kch kck kcr kcs kct ke- kea kec kee keg keh kek ker kes ket kga kgc kgh kgs kha khe khh khk khr khs kkc kke kkh kkk kkr kks kkt kra krc krg krk krr krs krt ksa ksc kse ksg ksh ksk ksr kss kst kta ktc kte ktg kth ktk ktr kts ktt ra- raa rac rae rag rah rak rar ras rat rca rcc rce rcg rch rcr rcs rct re- rea rec ree reg reh rek rer res ret rga rgc rge rgg rgh rgk rgr rgs rgt rh- rha rhc rhe rhg rhh rhr rhs rht rkc rke rkg rkk rks rkt rra rrc rrg rrh rrk rrr rrs rrt rsa rsc rse rsg rsh rsk rsr rss rst rta rtc rte rtg rtk rtr rts rtt saa sac sae sag sah sak sar sas sat sca scc sce scg sch sck scr scs sct se- sea sec see seg seh sek ser ses set sga sgc sge sgg sgh sgk sgr sgs sgt sh- sha shc she shg shh shk shr shs sht sk- ska skc ske skg skh skk skr sks skt sr- sra src sre srg srh srk srr srs srt ss- ssa ssc sse ssg ssh ssk ssr sss sst sta stc ste stg sth stk str sts stt taa tac tae tag tah tak tar tas tat tca tcc tce tcg tch tck tcr tcs tct te- tea tec tee teg teh tek ter tes tet tga tgc tge tgg tgh tgk tgr tgs tgt th- tha thc the thg thh thk thr ths tht tka tkc tke tkg tkk tkr tks tkt tra trc tre trg trh trk trr trs trt tsa tsc tse tsg tsh tsk tsr tss tst tta ttc tte ttg tth ttk ttr tts ttt