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: Got to be up in 4 hours to go back to work #cantsleep #excited
This tweet contains emotions: 
anticipation, joy