-er -ic a-a a-c a-i aaa aac aae aaf aag aai aan aar ac- aca acc ace acf acg aci acn acr aea aec aee aef aeg aei aen aer af- afa afc afe aff afg afi afn afr ag- aga agc age agf agg agi agn agr ai- aia aic aie aif aig aii ain air an- ana anc ane anf ang ani ann anr ar- ara arc are arf arg ari arn arr c-- caa cac cae caf cag cai can car cca ccc cce ccf ccg cci ccn ccr ce- cea cec cee cef ceg cei cen cer cfa cfc cfe cff cfg cfi cfn cfr cga cgc cge cgg cgi cgn cgr ci- cia cic cie cif cig cii cin cir cn- cna cnc cne cnf cng cni cnn cnr cra crc cre crf crg cri crn crr eaa eac eae eaf eag eai ean ear ec- eca ecc ece ecf ecg eci ecn ecr eea eec eee eef eeg een eer ef- efa efc efe eff efg efi efr ega egc ege egf egg egi egn egr eia eic eie eif eig eii ein eir en- ena enc ene enf eng eni enn enr era erc ere erf erg eri ern err faa fac fae faf fag fai fan far fca fcc fce fcf fcg fci fcn fcr fea fec fee fef feg fei fen fer ffa ffc ffe fff ffg ffi ffn ffr fga fgc fge fgf fgg fgi fgn fgr fia fic fie fif fig fii fin fir fna fnc fne fnf fng fni fnn fnr fra frc fre frf frg fri frn frr gaa gac gae gaf gag gai gan gar gca gcc gce gcf gcg gci gcn gcr ge- gea gec gee gef geg gei gen ger gfa gfc gfe gff gfi gfr gga ggc ggg ggi ggn ggr gia gic gie gif gig gii gin gir gna gnc gne gnf gni gnn gnr gra grc gre grf grg gri grn grr i-f ia- iaa iac iae iaf iag iai ian iar ica icc ice icf icg ici icn icr ie- iea iec iee ief ieg iei ien ier ifa ifc ife iff ifg ifi ifn ifr iga igc ige igf igg igi ign igr iia iic iie iif iii iin iir in- ina inc ine inf ing ini inn inr ir- ira irc ire irf irg iri irn irr n-i naa nac nae naf nag nai nan nar nca ncc nce ncf ncg nci ncn ncr ne- nea nec nee nef neg nei nen ner nfa nfc nfe nff nfi nfn nfr nga ngc nge ngf ngg ngi ngn nia nic nie nif nig nii nin nir nna nnc nne nnf nng nni nnn nra nrc nre nrf nrg nri nrn nrr ra- raa rac rae raf rag rai ran rar rca rcc rce rcf rcg rci rcn rcr re- rea rec ree ref reg rei ren rer rfa rfc rfe rff rfg rfi rfn rfr rga rgc rge rgf rgg rgi rgn rgr ria ric rie rif rig rii rin rir rna rnc rng rni rnn rnr rra rrc rrf rrg rri rrn rrr