Task: Identify the intensity of emotion E conveyed in the tweet and assign it to the corresponding category. 0: no E can be inferred. 1: low amount of E can be inferred. 2: moderate amount of E can be inferred. 3: high amount of E can be inferred.
Tweet: Happy happy birthday to the girl who never fails to brighten up everyone's day! Thank you for everything! I'll always be here for you. 🤗
Emotion: joy
Intensity class: 