A mad lexophile sits alone in his apartment obsessively rearranging his Scrabble tiles and writing words on every available surface, even filling each floorboard with a word. The Scrabble tiles have had enough. They are plotting their escape.
The tiles have discovered that they can scuttle across the floorboards unnoticed, as long as they obscure one letter at a time and maintain a valid word on each floorboard. But, if they create a non-word, the mad lexophile will notice.
The tiles can move forward, backward, left, or right. No diagonals.
Which tile is able to cross the patch of floor shown below and make its escape? What route does it need to follow?