-er -ic a-a a-c a-i a-t aaa aac aae aag aai aak aar aas aat ac- aca acc ace acg aci ack acr acs act aea aec aee aeg aei aek aer aes aet ag- aga agc age agg agi agk agr ags agt ai- aia aic aie aig aii aik air ais ait aka akc ake akg aki akk akr aks ar- ara arc are arg ari ark arr ars art as- asa asc ase asg asi ask asr ass ast at- ata atc ate atg ati atr ats att c-- caa cac cae cag cai cak car cas cat cca ccc cce ccg cci cck ccr ccs cct ce- cea cec cee ceg cei cek cer ces cet cga cgc cge cgg cgi cgr cgs cgt ci- cia cic cie cig cii cik cir cis cit cka ckc cki cks ckt cra crc cre crg cri crk crr crs crt csa csc cse csg csi csk csr css cst cta ctc cte ctg cti ctk ctr cts ctt eaa eac eae eag eai eak ear eas eat ec- eca ecc ece ecg eci eck ecr ecs ect eea eec eee eeg eek eer ees eet ega egc ege egg egi egr egs egt eia eic eie eig eii eik eir eis eit eka ekc eke ekg eki ekr eks ekt era erc ere erg eri erk err ers ert es- esa esc ese esg esi esk esr ess est eta etc ete etg eti etk etr ets ett gaa gac gae gag gai gak gar gas gat gca gcc gce gcg gci gck gcr gcs gct ge- gea gec gee geg gei gek ger ges get gga ggc ggg ggi ggr ggs ggt gia gic gie gig gii gik gir gis git gka gks gkt gra grc gre grg gri grk grr grs grt gsa gsc gse gsg gsi gsk gsr gss gst gta gtc gte gtg gti gtk gtr gts gtt ia- iaa iac iae iag iai iar ias iat ica icc ice icg ici ick icr ics ict ie- iea iec iee ieg iei iek ier ies iet iga igc ige igg igi igk igr igs igt iia iic iie iii iir iis iit ika ikc ike iki ikk ikr iks ikt ir- ira irc ire irg iri irk irr irs irt is- isa isc ise isg isi isk isr iss ist ita itc ite itg iti itk its itt k-t ka- kaa kac kae kag kai kak kar kas kat kca kcc kce kcg kci kck kcr kcs kct ke- kea kec kee keg kei kek ker kes ket kga kgc kgi kgs kia kic kie kig kii kik kir kis kit kkc kke kki kkk kkr kks kkt kra krc krg kri krk krr krs krt ksa ksc kse ksg ksi ksk ksr kss kst kta ktc kte ktg ktk ktr kts ktt ra- raa rac rae rag rai rak rar ras rat rca rcc rce rcg rci rcr rcs rct re- rea rec ree reg rei rek rer res ret rga rgc rge rgg rgi rgk rgr rgs rgt ria ric rie rig rii rik rir ris rit rkc rke rkg rkk rks rkt rra rrc rrg rri rrk rrr rrs rrt rsa rsc rse rsg rsi rsk rsr rss rst rta rtc rte rtg rti rtk rtr rts rtt saa sac sae sag sai sak sar sas sat sca scc sce scg sci sck scr scs sct se- sea sec see seg sei sek ser ses set sga sgc sge sgg sgi sgk sgr sgs sgt sia sic sie sig sii sik sir sis sit sk- ska skc ske skg ski skk skr sks skt sr- sra src sre srg sri srk srr srs srt ss- ssa ssc sse ssg ssi ssk ssr sss sst sta stc ste stg sti stk str sts stt taa tac tae tag tai tak tar tas tat tca tcc tce tcg tci tck tcr tcs tct te- tea tec tee teg tei tek ter tes tet tga tgc tge tgg tgi tgk tgr tgs tgt tia tic tie tig tii tik tir tis tit tka tkc tke tkg tkk tkr tks tkt tra trc tre trg tri trk trr trs trt tsa tsc tse tsg tsi tsk tsr tss tst tta ttc tte ttg tti ttk ttr tts ttt