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: A #smile brightens your day and the day of everyone around you, so remember to #smile, it's #free. :-)
This tweet contains emotions: 
joy, love, optimism