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: Liam was in Hawaii on vacation. Sentence2: He decided he would try some of their traditions. Sentence3: They had a famous ancient fire walk every weekend. Sentence4: Liam took off his shoes and socks and walked across hot coals. Sentence5: He feel within seconds and burned his elbows and knees.
Output:
Liam