iched cihed ihced hiced chied hcied icehd ciehd iechd eichd ceihd ecihd ihecd hiecd iehcd eihcd heicd ehicd cheid hceid cehid echid hecid ehcid ichde cihde ihcde hicde chide hcide icdhe cidhe idche diche cdihe dcihe ihdce hidce idhce dihce hdice dhice chdie hcdie cdhie dchie hdcie dhcie icedh ciedh iecdh eicdh ceidh ecidh icdeh cideh idceh diceh cdieh dcieh iedch eidch idech diech edich deich cedih ecdih cdeih dceih edcih decih ihedc hiedc iehdc eihdc heidc ehidc ihdec hidec idhec dihec hdiec dhiec iedhc eidhc idehc diehc edihc deihc hedic ehdic hdeic dheic edhic dehic chedi hcedi cehdi echdi hecdi ehcdi chdei hcdei cdhei dchei hdcei dhcei cedhi ecdhi cdehi dcehi edchi dechi hedci ehdci hdeci dheci edhci dehci
Note: these 'words' (valid or invalid) are all the permutations of the word iched. These words are obtained by scrambling the letters in iched.