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: Donald hated pickles. Sentence2: He went to a fast food place and ordered a burger. Sentence3: Donald forgot to order it without pickles. Sentence4: Donald realized there were pickles on the burger. Sentence5: He picked off the pickles before eating.
A:
Donald