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: Milly was playing with her jack in the box. Sentence2: She always startled when jack jumped up. Sentence3: This time she actually screamed when he popped out. Sentence4: Her brother had put a scary looking mask on him. Sentence5: She never played with that toy again.
Output:
Her brother, Milly, Jack in the box