by "changing one letter", Im assuming you can change "the non-existant letter place holder" to a letter. In short, make words other than 4 letters.
You shouldn't judge a book by it's cover, instead, you should read every single book to see what every book is about before you even come close to judging its viability.
He began to wonder why he had felt uneasy at all. It was like a man wondering in broad daylight why a dream had appeared so terrible to him at night. — Chinua Achebe, Things Fall Apart
