Task: Analyze the tweet's emotional expression, classifying it as 'neutral or no emotion' or as one or more of the identified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent the tweeter's emotional state.
Tweet: Just added a copy of CANDIDE to my local Little Free Library &amp; a guy grabbed it literally 5 seconds later #optimism #BestOfAllPossibleWorlds
This tweet contains emotions: 