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:
Marie starts with 95 erasers . She loses 42 . How many erasers does Marie end with ?

Ex Output:
53


Ex Input:
Bobby collects 2 blocks . Bobby 's father gives Bobby 6 more . How many blocks does Bobby have ?

Ex Output:
8


Ex Input:
Jason grew 32 watermelons and 22 cantelopes . Dan grew 31 watermelons . How many watermelons did they grow in total ?

Ex Output:

63