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: Extremely bitter about the fact that the Subway in Robart's has been replaced with a low-rent version of Chipotle
This tweet contains emotions: 
anger, disgust, sadness