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.
Q: Sentence1: Martha was on a cruise ship for her birthday. Sentence2: She took continuous photos with her camera. Sentence3: A beautiful island had soon caught her eye. Sentence4: Martha reached far over the rail, trying to get the perfect shot. Sentence5: Her hand slipped, and the camera fell into the ocean.
A:
Martha