Word Stacks is a game where you need to stack words on top of each other. The rules are simple:
1. You can only use one letter per word.
2. Each letter must be used once.
3. You can only use each letter in the stack once.
4. Words must be at least 3 letters long.
5. The first word must start with the letter on the bottom of the stack, and subsequent words must start with the letter on top of the previous word.
6. If you get stuck, you can try again from the last letter you placed on the stack.