-er -ic a-a a-c a-i aaa aac aae aai aan aap aar aax ac- aca acc ace aci acn acp acr acx aea aec aee aei aen aep aer aex ai- aia aic aie aii ain aip air aix an- ana anc ane ani ann anp anr anx ap- apa apc ape api apn app apr apx ar- ara arc are ari arn arp arr arx ax- axa axe axi axn axp axr axx c-- caa cac cae cai can cap car cax cca ccc cce cci ccn ccp ccr ccx ce- cea cec cee cei cen cep cer cex ci- cia cic cie cii cin cip cir cix cn- cna cnc cne cni cnn cnp cnr cnx cpa cpc cpe cpi cpn cpp cpr cpx cra crc cre cri crn crp crr crx cxc cxi cxp cxr cxx eaa eac eae eai ean eap ear eax ec- eca ecc ece eci ecn ecr ecx eea eec eee een eep eer eex eia eic eie eii ein eip eir eix en- ena enc ene eni enn enp enr ep- epa epc epe epi epn epp epr epx era erc ere eri ern erp err ex- exa exc exe exi exp exr exx ia- iaa iac iae iai ian iap iar ica icc ice ici icn icp icr ie- iea iec iee iei ien iep ier iex iia iic iie iii iin iip iir iix in- ina inc ine ini inn inp inr inx ipa ipc ipe ipi ipn ipp ipr ipx ir- ira irc ire iri irn irp irr irx ixc ixe ixi ixn n-i naa nac nae nai nan nap nar nax nca ncc nce nci ncn ncp ncr ncx ne- nea nec nee nei nen nep ner nex nia nic nie nii nin nip nir nix nna nnc nne nni nnn nnp npa npc npe npi npn npp npr nra nrc nre nri nrn nrp nrr nrx nxc p-p paa pac pae pai pan pap par pax pca pcc pce pci pcn pcp pcr pcx pea pec pee pei pen pep per pex pia pic pie pii pin pip pir pix pn- pna pnc pne pni pnn pnp pnr pnx ppa ppc ppe ppi ppn ppp ppr ppx pra prc pre pri prn prp prr prx pxc pxe pxr ra- raa rac rae rai ran rap rar rax rca rcc rce rci rcn rcp rcr rcx re- rea rec ree rei ren rep rer rex ria ric rie rii rin rip rir rix rna rnc rni rnn rnp rnr rpa rpc rpe rpi rpn rpp rpr rpx rra rrc rri rrn rrp rrr rxp rxr xaa xac xan xap xar xci xcp xcr xcx xee xen xep xer xex xia xic xie xii xin xix xna xnc xpa xpc xpe xpn xpp xrc xrx xxi xxp xxx