Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given 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 #nervous
This tweet contains emotions: 
anticipation, fear, joy