Instructions: 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: Tim was very picky when it came to food. Sentence2: He refused to try any new foods, he never even had cake! Sentence3: Tim was going to his friend Josh's birthday party soon. Sentence4: It was time for Tim to try cake, he got a piece on his plate. Sentence5: Tim took a bite and absolutely loved it!
Output:
Tim