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: Class is canceled due to a funeral. Not sure if it's appropriate to be happy or sad.. #happy
This tweet contains emotions: 
joy, sadness