Definition: 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.
Input: Sentence1: I had been on the bus for a day. Sentence2: I needed some caffeine to help stay awake. Sentence3: At the next stop I was getting a soda from the vending machine. Sentence4: A woman was looking for change in her purse to get her son a snack. Sentence5: I gave them the rest of my change and walked off feeling good.
Output:
I (myself), Woman, Son