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: God just replaced my sadness with laughter, can't go the whole day sad ...
This tweet contains emotions: 
joy, optimism, sadness