In this task, you will be given a sentence, and you need to identify the set of coreference words. Coreferences are generally a set of words in the text that refer to the same person or thing. Your output set of coreference words must be strictly present in the given input sentence. Do not use any outside knowledge to create the set of coreference words. If there is a 'the' article before the person or thing you should include 'the' as well. Please separate the coreference words by commas in the output.

Example Input: The analyst received care from the nurse but he did not mention his allergies .
Example Output: The, analyst, he, his

Example Input: The CEO gave the cashier cash because he wanted to pay for his goods .
Example Output: The, CEO, he, his

Example Input: The sheriff trusts the assistant because she was always honest .
Example Output:
the, assistant, she