Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
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