-er -ic a-a a-c a-i aaa aac aae aag aai aan aap aar aas ac- aca acc ace acg aci acn acp acr acs aea aec aee aeg aei aen aep aer aes ag- aga agc age agg agi agn agp agr ags ai- aia aic aie aig aii ain aip air ais an- ana anc ane ang ani ann anp anr ans ap- apa apc ape apg api apn app apr aps ar- ara arc are arg ari arn arp arr ars as- asa asc ase asg asi asn asp asr ass c-- caa cac cae cag cai can cap car cas cca ccc cce ccg cci ccn ccp ccr ccs ce- cea cec cee ceg cei cen cep cer ces cga cgc cge cgg cgi cgn cgp cgr cgs ci- cia cic cie cig cii cin cip cir cis cn- cna cnc cne cng cni cnn cnp cnr cns cpa cpc cpe cpg cpi cpn cpp cpr cps cra crc cre crg cri crn crp crr crs csa csc cse csg csi csn csp csr css eaa eac eae eag eai ean eap ear eas ec- eca ecc ece ecg eci ecn ecr ecs eea eec eee eeg een eep eer ees ega egc ege egg egi egn egp egr egs eia eic eie eig eii ein eip eir eis en- ena enc ene eng eni enn enp enr ens ep- epa epc epe epg epi epn epp epr eps era erc ere erg eri ern erp err ers es- esa esc ese esg esi esn esp esr ess g-p gaa gac gae gag gai gan gap gar gas gca gcc gce gcg gci gcn gcp gcr gcs ge- gea gec gee geg gei gen gep ger ges gga ggc ggg ggi ggn ggp ggr ggs gia gic gie gig gii gin gip gir gis gna gnc gne gni gnn gnp gnr gns gpa gpc gpe gpg gpi gpn gpp gpr gps gra grc gre grg gri grn grp grr grs gsa gsc gse gsg gsi gsn gsp gsr gss ia- iaa iac iae iag iai ian iap iar ias ica icc ice icg ici icn icp icr ics ie- iea iec iee ieg iei ien iep ier ies iga igc ige igg igi ign igp igr igs iia iic iie iii iin iip iir iis in- ina inc ine ing ini inn inp inr ins ipa ipc ipe ipg ipi ipn ipp ipr ips ir- ira irc ire irg iri irn irp irr irs is- isa isc ise isg isi isn isp isr iss n-i naa nac nae nag nai nan nap nar nas nca ncc nce ncg nci ncn ncp ncr ncs ne- nea nec nee neg nei nen nep ner nes nga ngc nge ngg ngi ngn ngp ngs nia nic nie nig nii nin nip nir nis nna nnc nne nng nni nnn nnp nns npa npc npe npg npi npn npp npr nps nra nrc nre nrg nri nrn nrp nrr nrs nsa nsc nse nsg nsi nsn nsp nsr nss p-p paa pac pae pag pai pan pap par pas pca pcc pce pcg pci pcn pcp pcr pcs pea pec pee peg pei pen pep per pes pga pgc pge pgg pgi pgn pgp pgr pgs pia pic pie pig pii pin pip pir pis pn- pna pnc pne png pni pnn pnp pnr pns ppa ppc ppe ppg ppi ppn ppp ppr pps pra prc pre prg pri prn prp prr prs ps- psa psc pse psg psi psn psp psr pss ra- raa rac rae rag rai ran rap rar ras rca rcc rce rcg rci rcn rcp rcr rcs re- rea rec ree reg rei ren rep rer res rga rgc rge rgg rgi rgn rgp rgr rgs ria ric rie rig rii rin rip rir ris rna rnc rng rni rnn rnp rnr rns rpa rpc rpe rpg rpi rpn rpp rpr rps rra rrc rrg rri rrn rrp rrr rrs rsa rsc rse rsg rsi rsn rsp rsr rss saa sac sae sag sai san sap sar sas sca scc sce scg sci scn scp scr scs se- sea sec see seg sei sen sep ser ses sga sgc sge sgg sgi sgn sgp sgr sgs sia sic sie sig sii sin sip sir sis sna snc sne sng sni snn snp snr sns spa spc spe spg spi spn spp spr sps sr- sra src sre srg sri srn srp srr srs ss- ssa ssc sse ssg ssi ssn ssp ssr sss