-er -ic a-a a-c a-i aaa aac aad aae aag aai aan aar ac- aca acc acd ace acg aci acn acr ad- ada adc add ade adg adi adn adr aea aec aed aee aeg aei aen aer ag- aga agc agd age agg agi agn agr ai- aia aic aid aie aig aii ain air an- ana anc and ane ang ani ann anr ar- ara arc ard are arg ari arn arr c-- caa cac cad cae cag cai can car cca ccc ccd cce ccg cci ccn ccr cda cdc cdd cde cdg cdi cdn cdr ce- cea cec ced cee ceg cei cen cer cga cgc cgd cge cgg cgi cgn cgr ci- cia cic cid cie cig cii cin cir cn- cna cnc cnd cne cng cni cnn cnr cra crc crd cre crg cri crn crr daa dac dad dae dag dai dan dar dca dcc dcd dce dcg dci dcn dcr dda ddc ddd dde ddg ddi ddn ddr de- dea dec ded dee deg dei den der dga dgc dgd dge dgg dgi dgn dgr di- dia dic did die dig dii din dir dna dnc dnd dne dng dni dnn dnr dra drc drd dre drg dri drn drr eaa eac ead eae eag eai ean ear ec- eca ecc ecd ece ecg eci ecn ecr ed- eda edc edd ede edg edi edn edr eea eec eed eee eeg een eer ega egc egd ege egg egi egn egr eia eic eid eie eig eii ein eir en- ena enc end ene eng eni enn enr era erc erd ere erg eri ern err g-d gaa gac gad gae gag gai gan gar gca gcc gcd gce gcg gci gcn gcr gda gdc gdd gde gdi gdn gdr ge- gea gec ged gee geg gei gen ger gga ggc ggd ggg ggi ggn ggr gia gic gid gie gig gii gin gir gna gnc gnd gne gni gnn gnr gra grc grd gre grg gri grn grr i-d ia- iaa iac iad iae iag iai ian iar ica icc icd ice icg ici icn icr ida idc idd ide idg idi idn idr ie- iea iec ied iee ieg iei ien ier iga igc igd ige igg igi ign igr iia iic iid iie iii iin iir in- ina inc ind ine ing ini inn inr ir- ira irc ird ire irg iri irn irr n-i naa nac nad nae nag nai nan nar nca ncc ncd nce ncg nci ncn ncr nda ndc ndd nde ndg ndi ndn ndr ne- nea nec ned nee neg nei nen ner nga ngc ngd nge ngg ngi ngn nia nic nid nie nig nii nin nir nna nnc nne nng nni nnn nra nrc nrd nre nrg nri nrn nrr ra- raa rac rad rae rag rai ran rar rca rcc rcd rce rcg rci rcn rcr rda rdc rdd rde rdg rdi rdn rdr re- rea rec red ree reg rei ren rer rga rgc rgd rge rgg rgi rgn rgr ria ric rid rie rig rii rin rir rna rnc rnd rng rni rnn rnr rra rrc rrd rrg rri rrn rrr