ehacc heacc eahcc aehcc haecc ahecc ehcac hecac echac cehac hceac cheac eachc aechc ecahc ceahc acehc caehc hacec ahcec hcaec chaec achec cahec ehacc heacc eahcc aehcc haecc ahecc ehcac hecac echac cehac hceac cheac eachc aechc ecahc ceahc acehc caehc hacec ahcec hcaec chaec achec cahec ehcca hecca echca cehca hceca checa ehcca hecca echca cehca hceca checa eccha cecha eccha cecha cceha cceha hccea chcea hccea chcea cchea cchea eacch aecch ecach ceach acech caech eacch aecch ecach ceach acech caech eccah cecah eccah cecah cceah cceah acceh caceh acceh caceh ccaeh ccaeh hacce ahcce hcace chace achce cahce hacce ahcce hcace chace achce cahce hccae chcae hccae chcae cchae cchae acche cache acche cache ccahe ccahe
Note: these 'words' (valid or invalid) are all the permutations of the word ehacc. These words are obtained by scrambling the letters in ehacc.