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.
These were autumn mornings, the time of year when kings of old went forth to conquest; and I, never stirring from my little corner in Calcutta, would let my mind wander over the whole world. — Rabindranath Tagore, The Cabuliwallah
