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: Successful people always have two things on their lips #silence nd #smile smile to avoid problems nd silence to avoid the problems too
This tweet contains emotions: 
joy