Task: Place the tweet into a specific intensity class, reflecting the intensity of the mentioned emotion E and the user's mental state. 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: Boy oh boy! our weekday schedule is crazy! But no matter how tired I am I do whatever it takes to keep the smile on Kai's face from a frown
Emotion: sadness
Intensity class: 