-er -ic a-a a-c a-i aaa aac aae aag aai aan aao aar aas ac- aca acc ace acg aci acn aco acr acs aea aec aee aeg aei aen aeo aer aes ag- aga agc age agg agi agn ago agr ags ai- aia aic aie aig aii ain aio air ais an- ana anc ane ang ani ann ano anr ans aoa aoc aoe aog aoi aon aoo aor aos ar- ara arc are arg ari arn aro arr ars as- asa asc ase asg asi asn aso asr ass c-- caa cac cae cag cai can cao car cas cca ccc cce ccg cci ccn cco ccr ccs ce- cea cec cee ceg cei cen ceo cer ces cga cgc cge cgg cgi cgn cgo cgr cgs ci- cia cic cie cig cii cin cio cir cis cn- cna cnc cne cng cni cnn cno cnr cns co- coa coc coe cog coi con coo cor cos cra crc cre crg cri crn cro crr crs csa csc cse csg csi csn cso csr css eaa eac eae eag eai ean eao ear eas ec- eca ecc ece ecg eci ecn eco ecr ecs eea eec eee eeg een eeo eer ees ega egc ege egg egi egn ego egr egs eia eic eie eig eii ein eio eir eis en- ena enc ene eng eni enn eno enr ens eo- eoa eoc eoe eog eoi eon eoo eor eos era erc ere erg eri ern ero err ers es- esa esc ese esg esi esn eso esr ess gaa gac gae gag gai gan gao gar gas gca gcc gce gcg gci gcn gco gcr gcs ge- gea gec gee geg gei gen geo ger ges gga ggc ggg ggi ggn ggo ggr ggs gia gic gie gig gii gin gio gir gis gna gnc gne gni gnn gno gnr gns goa goc goe gog goi gon goo gor gos gra grc gre grg gri grn gro grr grs gsa gsc gse gsg gsi gsn gso gsr gss ia- iaa iac iae iag iai ian iao iar ias ica icc ice icg ici icn ico icr ics ie- iea iec iee ieg iei ien ier ies iga igc ige igg igi ign igo igr igs iia iic iie iii iin iio iir iis in- ina inc ine ing ini inn ino inr ins io- ioa ioc ioe iog ioi ion ioo ior ios ir- ira irc ire irg iri irn iro irr irs is- isa isc ise isg isi isn iso isr iss n-i naa nac nae nag nai nan nao nar nas nca ncc nce ncg nci ncn nco ncr ncs ne- nea nec nee neg nei nen neo ner nes nga ngc nge ngg ngi ngn ngo ngs nia nic nie nig nii nin nio nir nis nna nnc nne nng nni nnn nno nns no- noa noc noe nog noi non noo nor nos nra nrc nre nrg nri nrn nro nrr nrs nsa nsc nse nsg nsi nsn nso nsr nss o-i oaa oac oae oag oai oan oao oar oas oc- oca occ ocg oci ocn oco ocr ocs oea oec oee oeg oei oen oeo oer oes oga ogc oge ogg ogi ogn ogo ogs oia oic oie oii oin oio oir ois on- ona onc one ong oni onn ono onr ons oo- ooa ooc oog ooi oon ooo oor oos or- ora orc ore org ori orn oro orr ors os- osa osc ose osg osi osn oso osr oss ra- raa rac rae rag rai ran rao rar ras rca rcc rce rcg rci rcn rco rcr rcs re- rea rec ree reg rei ren reo rer res rga rgc rge rgg rgi rgn rgo rgr rgs ria ric rie rig rii rin rio rir ris rna rnc rng rni rnn rno rnr rns roa roc roe rog roi ron roo ror ros rra rrc rrg rri rrn rrr rrs rsa rsc rse rsg rsi rsn rso rsr rss saa sac sae sag sai san sao sar sas sca scc sce scg sci scn sco scr scs se- sea sec see seg sei sen seo ser ses sga sgc sge sgg sgi sgn sgo sgr sgs sia sic sie sig sii sin sio sir sis sna snc sne sng sni snn sno snr sns soa soc soe sog soi son soo sor sos sr- sra src sre srg sri srn sro srr srs ss- ssa ssc sse ssg ssi ssn sso ssr sss