-er -ic a-a a-c a-i aaa aac aae aag aai aan aao aar ac- aca acc ace acg aci acn aco acr aea aec aee aeg aei aen aeo aer ag- aga agc age agg agi agn ago agr ai- aia aic aie aig aii ain aio air an- ana anc ane ang ani ann ano anr aoa aoc aoe aog aoi aon aoo aor ar- ara arc are arg ari arn aro arr c-- caa cac cae cag cai can cao car cca ccc cce ccg cci ccn cco ccr ce- cea cec cee ceg cei cen ceo cer cga cgc cge cgg cgi cgn cgo cgr ci- cia cic cie cig cii cin cio cir cn- cna cnc cne cng cni cnn cno cnr co- coa coc coe cog coi con coo cor cra crc cre crg cri crn cro crr eaa eac eae eag eai ean eao ear ec- eca ecc ece ecg eci ecn eco ecr eea eec eee eeg een eeo eer ega egc ege egg egi egn ego egr eia eic eie eig eii ein eio eir en- ena enc ene eng eni enn eno enr eo- eoa eoc eoe eog eoi eon eoo eor era erc ere erg eri ern ero err gaa gac gae gag gai gan gao gar gca gcc gce gcg gci gcn gco gcr ge- gea gec gee geg gei gen geo ger gga ggc ggg ggi ggn ggo ggr gia gic gie gig gii gin gio gir gna gnc gne gni gnn gno gnr goa goc goe gog goi gon goo gor gra grc gre grg gri grn gro grr ia- iaa iac iae iag iai ian iao iar ica icc ice icg ici icn ico icr ie- iea iec iee ieg iei ien ier iga igc ige igg igi ign igo igr iia iic iie iii iin iio iir in- ina inc ine ing ini inn ino inr io- ioa ioc ioe iog ioi ion ioo ior ir- ira irc ire irg iri irn iro irr n-i naa nac nae nag nai nan nao nar nca ncc nce ncg nci ncn nco ncr ne- nea nec nee neg nei nen neo ner nga ngc nge ngg ngi ngn ngo nia nic nie nig nii nin nio nir nna nnc nne nng nni nnn nno no- noa noc noe nog noi non noo nor nra nrc nre nrg nri nrn nro nrr o-i oaa oac oae oag oai oan oao oar oc- oca occ ocg oci ocn oco ocr oea oec oee oeg oei oen oeo oer oga ogc oge ogg ogi ogn ogo oia oic oie oii oin oio oir on- ona onc one ong oni onn ono onr oo- ooa ooc oog ooi oon ooo oor or- ora orc ore org ori orn oro orr ra- raa rac rae rag rai ran rao rar rca rcc rce rcg rci rcn rco rcr re- rea rec ree reg rei ren reo rer rga rgc rge rgg rgi rgn rgo rgr ria ric rie rig rii rin rio rir rna rnc rng rni rnn rno rnr roa roc roe rog roi ron roo ror rra rrc rrg rri rrn rrr