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: I gave up on the U20 Rugby bet on the Roosters!  #nrl
This tweet contains emotions: 
pessimism, sadness