Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: This night, room polluted with syringes, notebooks and shadows moving, this kind of night! Away melancholy, away!
This tweet contains emotions: 
pessimism, sadness