You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ex Input:
Context: There are 8 different movies and 21 different books in the ' crazy silly school ' series. If you read 7 of the books and watched 4 of the movies 

 Question: How many more movies do you still have to watch?

Ex Output:
4


Ex Input:
Context: A grocery store had 36 apples, 80 bottles of regular soda and 54 bottles of diet soda. 

 Question: How many more bottles than apple did they have?

Ex Output:
98


Ex Input:
Context: Marco and his dad went strawberry picking. Together they collected strawberries that weighed 36 pounds. On the way back Marco ' dad lost 8 pounds of strawberries. Marco's strawberries now weighed 12 pounds. 

 Question: How much did his dad's strawberries weigh now?

Ex Output:

16