Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: Why is it when you nap during the day you are so comfortable but sleeping at night you'll never be as comfortable
This tweet contains emotions: 
anger, anticipation, sadness