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:
Paul had saved up 4 dollars . If he received another 11 dollars for his allowance , how many 5 dollar toys could he buy ?

Ex Output:
3


Ex Input:
Students at Arcadia schools are participating in a coat drive . 9437 coats have been collected so far . 6922 coats were collected from the high schools , and the rest from the elementary schools . How many coats were collected at the elementary schools ?

Ex Output:
2515


Ex Input:
Sam had 98 pennies in his bank . He spent 93 of his pennies . How many pennies does he have now ?

Ex Output:

5