Given the task definition and input, reply with output. Indicate all the pronouns (they, them, you, he, his, her, you, it, etc.) present in the given sentence. If there are multiple such pronouns in a sentence, then list them in the order of their first appearance in the given sentence. If a pronoun appears multiple times in a sentence, list it only once.

tom threw his schoolbag down to ray after he reached the top of the stairs.

his, he