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: My father-in-law asked me to help with a project. Sentence2: He needed all the rocks under his deck to be moved. Sentence3: These rocks looked small but each scoop of them was very heavy. Sentence4: We dug rocks all day and it left me feeling exhausted by the end. Sentence5: The next morning I was very sore and realized that I am out of shape.
I (myself), My father-in-law