-er -ic a-a a-c a-i a-t aaa aac aae aag aai aap aar aat ac- aca acc ace acg aci acp acr act aea aec aee aeg aei aep aer aet ag- aga agc age agg agi agp agr agt ai- aia aic aie aig aii aip air ait ap- apa apc ape apg api app apr apt ar- ara arc are arg ari arp arr art at- ata atc ate atg ati atp atr att c-- caa cac cae cag cai cap car cat cca ccc cce ccg cci ccp ccr cct ce- cea cec cee ceg cei cep cer cet cga cgc cge cgg cgi cgp cgr cgt ci- cia cic cie cig cii cip cir cit cpa cpc cpe cpg cpi cpp cpr cpt cra crc cre crg cri crp crr crt cta ctc cte ctg cti ctp ctr ctt eaa eac eae eag eai eap ear eat ec- eca ecc ece ecg eci ecr ect eea eec eee eeg eep eer eet ega egc ege egg egi egp egr egt eia eic eie eig eii eip eir eit ep- epa epc epe epg epi epp epr ept era erc ere erg eri erp err ert eta etc ete etg eti etp etr ett g-p gaa gac gae gag gai gap gar gat gca gcc gce gcg gci gcp gcr gct ge- gea gec gee geg gei gep ger get gga ggc ggg ggi ggp ggr ggt gia gic gie gig gii gip gir git gpa gpc gpe gpg gpi gpp gpr gpt gra grc gre grg gri grp grr grt gta gtc gte gtg gti gtp gtr gtt ia- iaa iac iae iag iai iap iar iat ica icc ice icg ici icp icr ict ie- iea iec iee ieg iei iep ier iet iga igc ige igg igi igp igr igt iia iic iie iii iip iir iit ipa ipc ipe ipg ipi ipp ipr ipt ir- ira irc ire irg iri irp irr irt ita itc ite itg iti itp itt p-p paa pac pae pag pai pap par pat pca pcc pce pcg pci pcp pcr pct pea pec pee peg pei pep per pet pga pgc pge pgg pgi pgp pgr pgt pia pic pie pig pii pip pir pit ppa ppc ppe ppg ppi ppp ppr ppt pra prc pre prg pri prp prr prt pt- pta ptc pte ptg pti ptp ptr ptt ra- raa rac rae rag rai rap rar rat rca rcc rce rcg rci rcp rcr rct re- rea rec ree reg rei rep rer ret rga rgc rge rgg rgi rgp rgr rgt ria ric rie rig rii rip rir rit rpa rpc rpe rpg rpi rpp rpr rpt rra rrc rrg rri rrp rrr rrt rta rtc rte rtg rti rtp rtr rtt taa tac tae tag tai tap tar tat tca tcc tce tcg tci tcp tcr tct te- tea tec tee teg tei tep ter tet tga tgc tge tgg tgi tgp tgr tgt tia tic tie tig tii tip tir tit tpa tpc tpe tpg tpi tpp tpr tpt tra trc tre trg tri trp trr trt tta ttc tte ttg tti ttp ttr ttt