Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Letting go of anger is key to happiness. Please help me let go of these angry feelings. #happiness #anger
This tweet contains emotions: 
anger, joy, optimism