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: Marilyn starts with 51 bottle caps . She shares 36 with Nancy . How many bottle caps does Marilyn end with ?

Output: 15


Input: Consider Input: Jazmin had 1209 dolls and Geraldine had 2186 dolls . If they put their dolls together , how many would they have ?

Output: 3395


Input: Consider Input: Sara has 792 black and 122 red marbles . Fred took 233 of Sara 's black marbles . How many black marbles does Sara now have ?


Output: 559