yhall hyall yahll ayhll hayll ahyll yhlal hylal ylhal lyhal hlyal lhyal yalhl aylhl ylahl lyahl alyhl layhl halyl ahlyl hlayl lhayl alhyl lahyl yhall hyall yahll ayhll hayll ahyll yhlal hylal ylhal lyhal hlyal lhyal yalhl aylhl ylahl lyahl alyhl layhl halyl ahlyl hlayl lhayl alhyl lahyl yhlla hylla ylhla lyhla hlyla lhyla yhlla hylla ylhla lyhla hlyla lhyla yllha lylha yllha lylha llyha llyha hllya lhlya hllya lhlya llhya llhya yallh ayllh ylalh lyalh alylh laylh yallh ayllh ylalh lyalh alylh laylh yllah lylah yllah lylah llyah llyah allyh lalyh allyh lalyh llayh llayh hally ahlly hlaly lhaly alhly lahly hally ahlly hlaly lhaly alhly lahly hllay lhlay hllay lhlay llhay llhay allhy lalhy allhy lalhy llahy llahy
Note: these 'words' (valid or invalid) are all the permutations of the word yhall. These words are obtained by scrambling the letters in yhall.