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

Ex Input:
Megan has 19 seashells . How many more seashells does she need to find to have 25 seashells in her collection ?

Ex Output:
6


Ex Input:
There school 's baseball team had 2 new players and 6 returning players . If the coach put them into groups with 4 players in each group , how many groups would there be ?

Ex Output:
2


Ex Input:
There are 2 bananas in a pile on the desk . Each banana comes in a package of 17 . 7 bananas are added to the pile . How many bananas are there in the pile ?

Ex Output:

9