-er -ic a-a a-c a-i aaa aac aae aag aai aak aan aar ac- aca acc ace acg aci ack acn acr aea aec aee aeg aei aek aen aer ag- aga agc age agg agi agk agn agr ai- aia aic aie aig aii aik ain air aka akc ake akg aki akk akn akr an- ana anc ane ang ani ank ann anr ar- ara arc are arg ari ark arn arr c-- caa cac cae cag cai cak can car cca ccc cce ccg cci cck ccn ccr ce- cea cec cee ceg cei cek cen cer cga cgc cge cgg cgi cgn cgr ci- cia cic cie cig cii cik cin cir cka ckc cki cn- cna cnc cne cng cni cnn cnr cra crc cre crg cri crk crn crr eaa eac eae eag eai eak ean ear ec- eca ecc ece ecg eci eck ecn ecr eea eec eee eeg eek een eer ega egc ege egg egi egn egr eia eic eie eig eii eik ein eir eka ekc eke ekg eki ekr en- ena enc ene eng eni enk enn enr era erc ere erg eri erk ern err gaa gac gae gag gai gak gan gar gca gcc gce gcg gci gck gcn gcr ge- gea gec gee geg gei gek gen ger gga ggc ggg ggi ggn ggr gia gic gie gig gii gik gin gir gka gkn gna gnc gne gni gnn gnr gra grc gre grg gri grk grn grr ia- iaa iac iae iag iai ian iar ica icc ice icg ici ick icn icr ie- iea iec iee ieg iei iek ien ier iga igc ige igg igi igk ign igr iia iic iie iii iin iir ika ikc ike iki ikk ikr in- ina inc ine ing ini ink inn inr ir- ira irc ire irg iri irk irn irr ka- kaa kac kae kag kai kak kan kar kca kcc kce kcg kci kck kcn kcr ke- kea kec kee keg kei kek ken ker kga kgc kgi kia kic kie kig kii kik kin kir kkc kke kki kkk kkn kkr kn- kna knc kne kng kni knk knn knr kra krc krg kri krk krn krr n-i naa nac nae nag nai nak nan nar nca ncc nce ncg nci nck ncn ncr ne- nea nec nee neg nei nek nen ner nga ngc nge ngg ngi ngk ngn nia nic nie nig nii nik nin nir nka nkc nke nki nkk nkn nkr nna nnc nne nng nni nnk nnn nra nrc nre nrg nri nrk nrn nrr ra- raa rac rae rag rai rak ran rar rca rcc rce rcg rci rcn rcr re- rea rec ree reg rei rek ren rer rga rgc rge rgg rgi rgk rgn rgr ria ric rie rig rii rik rin rir rkc rke rkg rkk rna rnc rng rni rnn rnr rra rrc rrg rri rrk rrn rrr