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.

Ex Input:
Sentence1: Tori was running late to school. Sentence2: She rushed around looking for her shoes. Sentence3: She couldn't find them anywhere! Sentence4: By the time she finally found them, she had missed her bus. Sentence5: Her father had to take her to school that day.

Ex Output:
Father, Tori

Ex Input:
Sentence1: I was feeling really sick. Sentence2: We were lined up for the bathroom. Sentence3: I sat on the floor. Sentence4: The teacher told me to go to her. Sentence5: I walked up to her and vomited on her feet.

Ex Output:
I (myself), Teacher

Ex Input:
Sentence1: Miles feels restless after working all day. Sentence2: He decides to go to the park and walk by the flowers. Sentence3: When he sees a couple there it reminds him of how lonely he is. Sentence4: After seeing the couple Miles decides to go back home. Sentence5: He decides not to go walking by the flowers again.

Ex Output:
Couple, Miles