Task: Assign the tweet to a corresponding ordinal class that best reflects the inferred mental state of the tweeter, based on the intensity of positive or negative sentiment expressed. 1: positive, 0: neutral, -1: negative.
Tweet: for sale apple iphone 3gs 32gb , nokia n900 , nokia n97 , blackberry curve : welcome to nani mobiles limitedhello b . .
Intensity class: 