fecht efcht fceht cfeht ecfht cefht fehct efhct fhect hfect ehfct hefct fchet cfhet fhcet hfcet chfet hcfet echft cehft ehcft hecft cheft hceft fecth efcth fceth cfeth ecfth cefth fetch eftch ftech tfech etfch tefch fcteh cfteh ftceh tfceh ctfeh tcfeh ectfh cetfh etcfh tecfh ctefh tcefh fehtc efhtc fhetc hfetc ehftc heftc fethc efthc ftehc tfehc etfhc tefhc fhtec hftec fthec tfhec htfec thfec ehtfc hetfc ethfc tehfc htefc thefc fchte cfhte fhcte hfcte chfte hcfte fcthe cfthe ftche tfche ctfhe tcfhe fhtce hftce fthce tfhce htfce thfce chtfe hctfe cthfe tchfe htcfe thcfe echtf cehtf ehctf hectf chetf hcetf ecthf cethf etchf techf ctehf tcehf ehtcf hetcf ethcf tehcf htecf thecf chtef hctef cthef tchef htcef thcef
Note: these 'words' (valid or invalid) are all the permutations of the word fecht. These words are obtained by scrambling the letters in fecht.