You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.

Input: Consider Input: There are 46 rulers in the drawer . Tim took 25 rulers from the drawer . How many rulers are now in the drawer ?

Output: 21


Input: Consider Input: 532 people are watching a movie in a theater . The theater has 750 seats . How many seats are empty in the theater ?

Output: 218


Input: Consider Input: Bobby has 142 books . Kristi has 78 books . How many more books does Bobby have than Kristi ?


Output: 64