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.

Input: Consider Input: There are 38 books on the shelf . Marta put 10 more books on the shelf . How many books are on the shelf now ?

Output: 48


Input: Consider Input: Lana 's favorite band was holding a concert where tickets were 6 dollars each . Lana bought 8 tickets for herself and her friends and 2 extra tickets in case anyone else wanted to go . How much did she spend ?

Output: 60


Input: Consider Input: A toy store had 17 giant stuffed bears in stock when they got another shipment with 10 bears in it . The put the bears onto shelves with 9 on each shelf . How many shelves did they use ?


Output: 3