Your answer must contain a title, wrapped in double angular brackets, such as <<poem of joy>>. Your response should contain at least 5 sentences. At the end of your response, please explicitly add a postscript starting with P.S. Include keywords [nature, beauty, serenity, peace] in the response. In your response, the word [serenity] should appear at least 3 times. Your entire response should be in English, and in all lowercase letters. no capital letters are allowed.
user