Definition: 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 made himself a jetpack out of some spare parts. Sentence2: He gave it a quick test for safety before he tried it himself. Sentence3: Pat strapped the jetpack to himself on the test pad he made. Sentence4: He looked at the sky and switched on the engine. Sentence5: Pat took off and zoomed away into the sky.
Output:
Pat