Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: This prison is awfully gloomy. Would you mind if I put some ribbons on the bars?
This tweet contains emotions: 
disgust, joy, optimism