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:
Larry starts with 91 cards . 17 are eaten by a hippopotamus . How many cards does Larry end with ?

Ex Output:
74


Ex Input:
There are 6 candies in a pile on the desk . Each candy comes in a package of 15 . 4 candies are added to the pile . How many candies are there in the pile ?

Ex Output:
10


Ex Input:
Mrs. Hilt bought a yoyo for 24 cents and a whistle for 14 cents . How much did she spend in all for the two toys ?

Ex Output:

38