Definition: Classify given movie review into two categories: positive, or negative based on its content.

Positive Example 1 -
Input: if you sometimes like to go to the movies to have fun , wasabi is a good place to start .
Output: positive

Positive Example 2 -
Input: this is a film well worth seeing , talking and singing heads and all .
Output: positive

Negative Example 1 -
Input: creepy but ultimately unsatisfying thriller .
Output: positive

Negative Example 2 -
Input: the film often achieves a mesmerizing poetry .
Output: negative

Now complete the following example -
Input: a first-class , thoroughly involving b movie that effectively combines two surefire , beloved genres -- the prison flick and the fight film .
Output: 


Output: positive