Classify the emotions found in the tweet "smiling through the stress :) :) :) :) :) :) :( :( :( :( :( :( :(". Select from the following: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If the tweet is emotionless, reply "neutral or no emotion".
joy, optimism, sadness, trust