heath ehath haeth aheth eahth aehth hetah ehtah hteah theah ethah tehah hateh ahteh htaeh thaeh atheh taheh eathh aethh etahh teahh atehh taehh heaht ehaht haeht aheht eahht aehht hehat ehhat hheat hheat ehhat hehat hahet ahhet hhaet hhaet ahhet hahet eahht aehht ehaht heaht aheht haeht hetha ehtha hteha theha ethha tehha hehta ehhta hheta hheta ehhta hehta hthea thhea hhtea hhtea thhea hthea ethha tehha ehtha hetha theha hteha hathe ahthe htahe thahe athhe tahhe hahte ahhte hhate hhate ahhte hahte hthae thhae hhtae hhtae thhae hthae athhe tahhe ahthe hathe thahe htahe eathh aethh etahh teahh atehh taehh eahth aehth ehath heath aheth haeth ethah tehah ehtah hetah theah hteah atheh taheh ahteh hateh thaeh htaeh
Note: these 'words' (valid or invalid) are all the permutations of the word heath. These words are obtained by scrambling the letters in heath.