Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: God just replaced my sadness with laughter, can't go the whole day sad ...
This tweet contains emotions: 
joy, optimism, sadness