macas amcas mcaas cmaas acmas camas maacs amacs maacs amacs aamcs aamcs mcaas cmaas macas amcas camas acmas acams caams aacms aacms caams acams macsa amcsa mcasa cmasa acmsa camsa masca amsca msaca smaca asmca samca mcsaa cmsaa mscaa smcaa csmaa scmaa acsma casma ascma sacma csama scama maasc amasc maasc amasc aamsc aamsc masac amsac msaac smaac asmac samac masac amsac msaac smaac asmac samac aasmc aasmc asamc saamc asamc saamc mcasa cmasa macsa amcsa camsa acmsa mcsaa cmsaa mscaa smcaa csmaa scmaa masca amsca msaca smaca asmca samca casma acsma csama scama ascma sacma acasm caasm aacsm aacsm caasm acasm acsam casam ascam sacam csaam scaam aascm aascm asacm saacm asacm saacm casam acsam csaam scaam ascam sacam
Note: these 'words' (valid or invalid) are all the permutations of the word macas. These words are obtained by scrambling the letters in macas.