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.

Ex Input:
Isabella ’ s hair is 18 inches long . By the end of the year her hair is 24 inches long . How much hair did she grow ?

Ex Output:
6


Ex Input:
Joan went to 4 football games this year . She went to 9 football games last year . How many football games did Joan go to in all ?

Ex Output:
13


Ex Input:
There are 41 crayons and 26 pencils in the drawer . Sam placed 12 crayons in the drawer . How many crayons are now there in total ?

Ex Output:

53