-er -ic a-a a-c a-i aaa aac aae aai aan aar aax ac- aca acc ace aci acn acr acx aea aec aee aei aen aer aex ai- aia aic aie aii ain air aix an- ana anc ane ani ann anr anx ar- ara arc are ari arn arr arx ax- axa axe axi axn axr axx c-- caa cac cae cai can car cax cca ccc cce cci ccn ccr ccx ce- cea cec cee cei cen cer cex ci- cia cic cie cii cin cir cix cn- cna cnc cne cni cnn cnr cnx cra crc cre cri crn crr crx cxc cxi cxr cxx eaa eac eae eai ean ear eax ec- eca ecc ece eci ecn ecr ecx eea eec eee een eer eex eia eic eie eii ein eir eix en- ena enc ene eni enn enr era erc ere eri ern err ex- exa exc exe exi exr exx ia- iaa iac iae iai ian iar ica icc ice ici icn icr ie- iea iec iee iei ien ier iex iia iic iie iii iin iir iix in- ina inc ine ini inn inr inx ir- ira irc ire iri irn irr irx ixc ixe ixi ixn n-i naa nac nae nai nan nar nax nca ncc nce nci ncn ncr ncx ne- nea nec nee nei nen ner nex nia nic nie nii nin nir nix nna nnc nne nni nnn nra nrc nre nri nrn nrr nrx nxc ra- raa rac rae rai ran rar rax rca rcc rce rci rcn rcr rcx re- rea rec ree rei ren rer rex ria ric rie rii rin rir rix rna rnc rni rnn rnr rra rrc rri rrn rrr rxr xaa xac xan xar xci xcr xcx xee xen xer xex xia xic xie xii xin xix xna xnc xrc xrx xxi xxx