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: Consider Input: Sentence1: Erin was cleaning out his basement one morning. Sentence2: While he was cleaning it, he found an old antique watch. Sentence3: He searched on the internet to see what type of watch it was. Sentence4: He realized that it was a watch from the 1800s! Sentence5: He decided to put it on Ebay and he made a lot of money.

Output: Erin

Input: Consider Input: Sentence1: Julia was looking for her very favorite blouse. Sentence2: When she didn't find it she went to ask her sister. Sentence3: To her surprise her sister was wearing the shirt. Sentence4: She refused to take it off and Julia attacked her. Sentence5: Their dad broke it up and took the shirt away for good.

Output: Dad, Sister, Julia

Input: Consider Input: Sentence1: I dreamed of having a baby when i was in college. Sentence2: Because i saw one of my classmate that she is happy with that child. Sentence3: She dress her daughter,tie her hair and play with her. Sentence4: I thought having a child is that easy. Sentence5: But now that i have a son,i realized how difficult having a child.
Output: I (myself), My son, Classmate