You will be given a definition of a task first, then some input of the task.
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.

the man couldn't lift his son because he was so heavy.
Output:
his, he