theta hteta tehta ethta hetta ehtta thtea httea tthea tthea httea thtea tetha ettha tteha tteha ettha tetha hetta ehtta hteta theta ethta tehta theat hteat tehat ethat hetat ehtat thaet htaet tahet athet hatet ahtet teaht etaht taeht ateht eatht aetht heatt ehatt haett ahett eahtt aehtt thtae httae tthae tthae httae thtae thate htate tahte athte hatte ahtte ttahe ttahe tathe atthe tathe atthe htate thate hatte ahtte tahte athte tetah ettah tteah tteah ettah tetah teath etath taeth ateth eatth aetth ttaeh ttaeh tateh atteh tateh atteh etath teath eatth aetth taeth ateth hetat ehtat hteat theat ethat tehat heatt ehatt haett ahett eahtt aehtt htaet thaet hatet ahtet tahet athet etaht teaht eatht aetht taeht ateht
Note: these 'words' (valid or invalid) are all the permutations of the word theta. These words are obtained by scrambling the letters in theta.