-er -ic a-a a-c a-i aaa aac aae aag aai aan aar ac- aca acc ace acg aci acn acr aea aec aee aeg aei aen aer ag- aga agc age agg agi agn agr ai- aia aic aie aig aii ain air an- ana anc ane ang ani ann anr ar- ara arc are arg ari arn arr c-- caa cac cae cag cai can car cca ccc cce ccg cci ccn ccr ce- cea cec cee ceg cei cen cer cga cgc cge cgg cgi cgn cgr ci- cia cic cie cig cii cin cir cn- cna cnc cne cng cni cnn cnr cra crc cre crg cri crn crr eaa eac eae eag eai ean ear ec- eca ecc ece ecg eci ecn ecr eea eec eee eeg een eer ega egc ege egg egi egn egr eia eic eie eig eii ein eir en- ena enc ene eng eni enn enr era erc ere erg eri ern err gaa gac gae gag gai gan gar gca gcc gce gcg gci gcn gcr ge- gea gec gee geg gei gen ger gga ggc ggg ggi ggn ggr gia gic gie gig gii gin gir gna gnc gne gni gnn gnr gra grc gre grg gri grn grr ia- iaa iac iae iag iai ian iar ica icc ice icg ici icn icr ie- iea iec iee ieg iei ien ier iga igc ige igg igi ign igr iia iic iie iii iin iir in- ina inc ine ing ini inn inr ir- ira irc ire irg iri irn irr n-i naa nac nae nag nai nan nar nca ncc nce ncg nci ncn ncr ne- nea nec nee neg nei nen ner nga ngc nge ngg ngi ngn nia nic nie nig nii nin nir nna nnc nne nng nni nnn nra nrc nre nrg nri nrn nrr ra- raa rac rae rag rai ran rar rca rcc rce rcg rci rcn rcr re- rea rec ree reg rei ren rer rga rgc rge rgg rgi rgn rgr ria ric rie rig rii rin rir rna rnc rng rni rnn rnr rra rrc rrg rri rrn rrr