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: the sad moment when u hand in an exam knowing u failed and grieve by eating and sleeping
This tweet contains emotions: 
fear, pessimism, sadness