Please analyze the tweet "Finished writing my second book tonight. #somber #sad #youpromised #havemercy #author #writer #needpublisher #beingedited #workingonsidebook" and classify its emotional content. Choose from the following emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotions are detected, respond with "neutral or no emotion".
joy, optimism, sadness