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: Pat was running from the cops. Sentence2: He was over a bridge now and the river was far below. Sentence3: Pat decided to jump off to evade the police. Sentence4: He climbed on the ledge and got ready to leap. Sentence5: A policeman grabbed his shirt before he could jump.
Output:
Pat