You will be given a definition of a task first, then some input of the task.
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.

Sentence1: Ronnie worked at a train station. Sentence2: He was responsible for fixing and maintaining the rails. Sentence3: During work one day, he noticed a large crack in one of the rails. Sentence4: Just to be safe, he pulled up the entire track to inspect. Sentence5: He was glad that he did, as they were all gravely deteriorated.
Output:
Ronnie