iches cihes ihces hices chies hcies icehs ciehs iechs eichs ceihs ecihs ihecs hiecs iehcs eihcs heics ehics cheis hceis cehis echis hecis ehcis ichse cihse ihcse hicse chise hcise icshe cishe ische siche csihe scihe ihsce hisce ishce sihce hsice shice chsie hcsie cshie schie hscie shcie icesh ciesh iecsh eicsh ceish ecish icseh ciseh isceh siceh csieh scieh iesch eisch isech siech esich seich cesih ecsih cseih sceih escih secih ihesc hiesc iehsc eihsc heisc ehisc ihsec hisec ishec sihec hsiec shiec ieshc eishc isehc siehc esihc seihc hesic ehsic hseic sheic eshic sehic chesi hcesi cehsi echsi hecsi ehcsi chsei hcsei cshei schei hscei shcei ceshi ecshi csehi scehi eschi sechi hesci ehsci hseci sheci eshci sehci
Note: these 'words' (valid or invalid) are all the permutations of the word iches. These words are obtained by scrambling the letters in iches.