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: At the schools book fair Sam bought 13 adventure books and 17 mystery books . If 15 of the books were used , how many new books did he buy ?

Output: 15


Input: Consider Input: Adam had 5 dollars . At the store he spent $ 2 on a new game . If he got another 5 dollars for his allowance , how much money does he have now ?

Output: 8


Input: Consider Input: There were 2 friends playing a video game online when 2 more players joined the game . If each player had 8 lives , how many lives did they have total ?


Output: 32