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:
Sean has 55 blocks . 29 are eaten by a hippopotamus . How many blocks will Sean have ?

Ex Output:
26


Ex Input:
Mary had 8 potatoes in the garden . The rabbits ate 3 of the potatoes . How many potatoes does Mary now have ?

Ex Output:
5


Ex Input:
There are 88 candies in a box . Lisa has 18 candies in a bag . Diana takes 6 candies out of the box . How many candies are left in the box ?

Ex Output:

82