aaaa aaac aaae aaam aaca aacc aace aacm aaea aaec aaem aama aamc aame acaa acac acae acca accc acce accm ace- acea acec acem acma acmc acme aeac amaa amac amae amam amax amca amcc amec amee amex amm- amma amme axce caaa caac caam cac- caca cacc cace cacm caec caem caex cama camc came camm camx caxa ccaa ccac ccam ccca cccc cccm ccee ccma ccmc ccmm ceac cec- ceca cece cecm ceec ceem cema ceme cemm cexe cmaa cmac cmax cmcc cmea cmec cmmc cxxx eaca eacc eaec eama eame ecaa ecac ecam ecca eccc ecce eccm ecem ecma eeca eeea eeee emac emae emam emax emcc emex emma emme exa- exam exec maaa maac maam mac- maca macc mace macx maee maem mama mamc mame maxx mcaa mcac mcca mccc mccx mcmc mcmx mcxc mec- meca mecc mece meem mema memc meme memx mexx mmaa mmac mmcc mmcm mmcx mmea mmmc mmmm mmxx xace xema xeme xexe xmax xxxx