Given the task definition and input, reply with output. In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: A large tree had branches that grew over power lines. Sentence2: During a large storm the tree was shook by the wind. Sentence3: The wind was so strong the tree fell over. Sentence4: The branches crashed through the power lines. Sentence5: The town instantly lost power.
Town, Power lines, Tree, Wind