Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: Maybe the entire Russian team will test positive for meldonium and the North Americans will get to replace them #optimism
This tweet contains emotions: 
optimism