How do you play thread?

Each thread consists of a starting word and a secret word. The goal is to change the starting word into the secret word, changing only one letter per turn.

Rules:

1. Each game has four turns

2. You may change only one letter per turn

3. Every time you change a letter, it must make another valid (i.e. real) five letter word

4. You get three chances to make the correct change per turn.

Example: