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: But what will complaining, pessimism, regret, and anger get you?
This tweet contains emotions: 
anger, pessimism, sadness