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: John was the only one to survive a plane crash. Sentence2: He was afraid but he wanted to live so he pushed himself forward. Sentence3: He checked the crash for anything that would help his survival. Sentence4: He found food and clothing and decides to use the airplane as shelter. Sentence5: He found a map,realized that a town was nearby and so he went there.
Output:
John