-er -ic a-a a-c a-i aaa aac aae aaf aai aan aar aax ac- aca acc ace acf aci acn acr acx aea aec aee aef aei aen aer aex af- afa afc afe aff afi afn afr afx ai- aia aic aie aif aii ain air aix an- ana anc ane anf ani ann anr anx ar- ara arc are arf ari arn arr arx ax- axa axe axi axn axr axx c-- caa cac cae caf cai can car cax cca ccc cce ccf cci ccn ccr ccx ce- cea cec cee cef cei cen cer cex cfa cfc cfe cff cfi cfn cfr cfx ci- cia cic cie cif cii cin cir cix cn- cna cnc cne cnf cni cnn cnr cnx cra crc cre crf cri crn crr crx cxc cxf cxi cxr cxx eaa eac eae eaf eai ean ear eax ec- eca ecc ece ecf eci ecn ecr ecx eea eec eee eef een eer eex ef- efa efc efe eff efi efr efx eia eic eie eif eii ein eir eix en- ena enc ene enf eni enn enr era erc ere erf eri ern err ex- exa exc exe exi exr exx faa fac fae faf fai fan far fax fca fcc fce fcf fci fcn fcr fcx fea fec fee fef fei fen fer fex ffa ffc ffe fff ffi ffn ffr ffx fia fic fie fif fii fin fir fix fna fnc fne fnf fni fnn fnr fnx fra frc fre frf fri frn frr fxe fxi fxr fxx i-f ia- iaa iac iae iaf iai ian iar ica icc ice icf ici icn icr ie- iea iec iee ief iei ien ier iex ifa ifc ife iff ifi ifn ifr ifx iia iic iie iif iii iin iir iix in- ina inc ine inf ini inn inr inx ir- ira irc ire irf iri irn irr irx ixc ixe ixi ixn n-i naa nac nae naf nai nan nar nax nca ncc nce ncf nci ncn ncr ncx ne- nea nec nee nef nei nen ner nex nfa nfc nfe nff nfi nfn nfr nia nic nie nif nii nin nir nix nna nnc nne nnf nni nnn nra nrc nre nrf nri nrn nrr nrx nxc ra- raa rac rae raf rai ran rar rax rca rcc rce rcf rci rcn rcr rcx re- rea rec ree ref rei ren rer rex rfa rfc rfe rff rfi rfn rfr ria ric rie rif rii rin rir rix rna rnc rni rnn rnr rra rrc rrf rri rrn rrr rxr xaa xac xaf xan xar xcf xci xcr xcx xee xen xer xex xfa xfe xfn xfx xia xic xie xii xin xix xna xnc xrc xrf xrx xxi xxx