Task: Assess the emotional content of the tweet and classify 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 best represent the tweeter's mental state.
Tweet: 5 person of renown cheerful expectation solutions-pleasure principle back: HsNHZMJSc
This tweet contains emotions: 
joy, optimism