Your response should contain at least 3 sentences. Your answer must contain a title, wrapped in double angular brackets, such as <<poem of joy>>. At the end of your response, please explicitly add a postscript starting with P.P.S. Your entire response should be in English, and in all lowercase letters. no capital letters are allowed. in your response, the word 'joy' should appear at least 4 times. answer the following question: what is the definition of joy?
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