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: 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.

Output: Father, Tori

Input: Consider Input: Sentence1: Matt's mom promised a surprise for him after school. Sentence2: He was excited all day. Sentence3: So excited that he wasn't paying attention during math class. Sentence4: When he didn't answer when called, he was given detention. Sentence5: Matt would have to wait longer to find out what was his surprise.

Output: Matt, Matt's mom

Input: Consider Input: Sentence1: Beth and Joe went to their cabin retreat for a short break. Sentence2: They had to hike for several hours to reach the cabin. Sentence3: Sweaty and dirty, they both felt they needed to take a shower. Sentence4: Beth took a shower first and used up almost all the water. Sentence5: Joe got upset at Beth and went for a dip in the lake.
Output: Beth, Joe