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: Sam wanted to look good in his new shoes. Sentence2: He installed fancy new shoe laces in the shoes. Sentence3: The laces changed color in the sun and glowed in the dark. Sentence4: He went outside to test them out. Sentence5: The laces turned into a rainbow and he was happy for the day.
Sam