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 homeless man approached my car. Sentence2: He asked for some food. Sentence3: I gave him a burger I recently bought. Sentence4: He asked if there's pickles and I immediately said no. Sentence5: He gave the hamburger back and walked away.
I (myself), Homeless man