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: 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