Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: I understand now...if it's not pleasing to the ear...then it ain't what you want! I'm so so tired!!
This tweet contains emotions: 
anger, sadness