Instructions: 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: My dog died last year from old age. Sentence2: He was buried under a huge pink rose bush. Sentence3: We buried him inside his favorite carrier, a red one. Sentence4: We placed a professionally made stone on his grave. Sentence5: The inscription said he was a dog with the heart of a lion.
Output:
I (myself), Dog