-er -ic a-a a-c a-i a-t aaa aac aae aag aai aap aar aas aat ac- aca acc ace acg aci acp acr acs act aea aec aee aeg aei aep aer aes aet ag- aga agc age agg agi agp agr ags agt ai- aia aic aie aig aii aip air ais ait ap- apa apc ape apg api app apr aps apt ar- ara arc are arg ari arp arr ars art as- asa asc ase asg asi asp asr ass ast at- ata atc ate atg ati atp atr ats att c-- caa cac cae cag cai cap car cas cat cca ccc cce ccg cci ccp ccr ccs cct ce- cea cec cee ceg cei cep cer ces cet cga cgc cge cgg cgi cgp cgr cgs cgt ci- cia cic cie cig cii cip cir cis cit cpa cpc cpe cpg cpi cpp cpr cps cpt cra crc cre crg cri crp crr crs crt csa csc cse csg csi csp csr css cst cta ctc cte ctg cti ctp ctr cts ctt eaa eac eae eag eai eap ear eas eat ec- eca ecc ece ecg eci ecr ecs ect eea eec eee eeg eep eer ees eet ega egc ege egg egi egp egr egs egt eia eic eie eig eii eip eir eis eit ep- epa epc epe epg epi epp epr eps ept era erc ere erg eri erp err ers ert es- esa esc ese esg esi esp esr ess est eta etc ete etg eti etp etr ets ett g-p gaa gac gae gag gai gap gar gas gat gca gcc gce gcg gci gcp gcr gcs gct ge- gea gec gee geg gei gep ger ges get gga ggc ggg ggi ggp ggr ggs ggt gia gic gie gig gii gip gir gis git gpa gpc gpe gpg gpi gpp gpr gps gpt gra grc gre grg gri grp grr grs grt gsa gsc gse gsg gsi gsp gsr gss gst gta gtc gte gtg gti gtp gtr gts gtt ia- iaa iac iae iag iai iap iar ias iat ica icc ice icg ici icp icr ics ict ie- iea iec iee ieg iei iep ier ies iet iga igc ige igg igi igp igr igs igt iia iic iie iii iip iir iis iit ipa ipc ipe ipg ipi ipp ipr ips ipt ir- ira irc ire irg iri irp irr irs irt is- isa isc ise isg isi isp isr iss ist ita itc ite itg iti itp its itt p-p paa pac pae pag pai pap par pas pat pca pcc pce pcg pci pcp pcr pcs pct pea pec pee peg pei pep per pes pet pga pgc pge pgg pgi pgp pgr pgs pgt pia pic pie pig pii pip pir pis pit ppa ppc ppe ppg ppi ppp ppr pps ppt pra prc pre prg pri prp prr prs prt ps- psa psc pse psg psi psp psr pss pst pt- pta ptc pte ptg pti ptp ptr pts ptt ra- raa rac rae rag rai rap rar ras rat rca rcc rce rcg rci rcp rcr rcs rct re- rea rec ree reg rei rep rer res ret rga rgc rge rgg rgi rgp rgr rgs rgt ria ric rie rig rii rip rir ris rit rpa rpc rpe rpg rpi rpp rpr rps rpt rra rrc rrg rri rrp rrr rrs rrt rsa rsc rse rsg rsi rsp rsr rss rst rta rtc rte rtg rti rtp rtr rts rtt saa sac sae sag sai sap sar sas sat sca scc sce scg sci scp scr scs sct se- sea sec see seg sei sep ser ses set sga sgc sge sgg sgi sgp sgr sgs sgt sia sic sie sig sii sip sir sis sit spa spc spe spg spi spp spr sps spt sr- sra src sre srg sri srp srr srs srt ss- ssa ssc sse ssg ssi ssp ssr sss sst sta stc ste stg sti stp str sts stt taa tac tae tag tai tap tar tas tat tca tcc tce tcg tci tcp tcr tcs tct te- tea tec tee teg tei tep ter tes tet tga tgc tge tgg tgi tgp tgr tgs tgt tia tic tie tig tii tip tir tis tit tpa tpc tpe tpg tpi tpp tpr tps tpt tra trc tre trg tri trp trr trs trt tsa tsc tse tsg tsi tsp tsr tss tst tta ttc tte ttg tti ttp ttr tts ttt