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: What a sad day...1st day of Fall...I don't dislike Fall...I just LOVE Summer #FirstDayofFall #goodbyesummer #sadness #bathingsuitsforever
This tweet contains emotions: 
pessimism, sadness