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: Just received the fantastic news that our next 9 bed 'Sui Generis' HMO has full planning permission. Build to start 01 September. #excited
This tweet contains emotions: 
joy, optimism