Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the 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