-ic c-- ccc cce ccf cci ccm ccx ce- cec cee cef cei cem cex cfc cfe cff cfi cfm cfx ci- cic cie cif cii cim cix cmc cme cmf cmi cmm cmx cxc cxf cxi cxx ec- ecc ece ecf eci ecm ecx eec eee eef eem eex ef- efc efe eff efi efm efx eic eie eif eii eim eix em- emc eme emf emi emm emx ex- exc exe exi exx fcc fce fcf fci fcm fcx fec fee fef fei fem fex ffc ffe fff ffi ffm ffx fic fie fif fii fim fix fmc fme fmf fmi fmm fmx fxe fxi fxm fxx i-f icc ice icf ici icm ie- iec iee ief iei iem iex ifc ife iff ifi ifm ifx iic iie iif iii iim iix im- imc ime imf imi imm imx ixc ixe ixi m-f mc- mcc mce mcf mci mcm mcx mec mee mef mei mem mex mfc mfe mff mfi mfm mi- mic mie mif mii mim mix mmc mme mmf mmi mmm mmx mxc mxi xcf xci xcx xee xem xex xfe xfm xfx xic xie xii xix xmc xmf xmi xmm xmx xxi xxx