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.

Example Input: Sentence1: My friends and I went to a music festival. Sentence2: We got to see eighty different bands. Sentence3: The atmosphere was like a carnival. Sentence4: We danced until daybreak each day. Sentence5: By the end of the weekend, we were exhausted and happy.
Example Output: I (myself), My friends, My friends and i

Example Input: Sentence1: The boy asked for permission. Sentence2: Permission was denied. Sentence3: The boy did it anyways. Sentence4: He got caught. Sentence5: The boy was punished.
Example Output: Boy

Example Input: Sentence1: Geraldine received an orchid for her birthday. Sentence2: She really like plants but didn't know how to keep one alive. Sentence3: As she thought the soil was dry, she watered it. Sentence4: But two days later the flowers started falling. Sentence5: Geraldine realized she had killed yet another plant!
Example Output:
Geraldine