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: While on vacation , Nancy took 49 pictures at the zoo and 8 at the museum . If she later deleted 38 of the pictures , how many pictures from her vacation did she still have ?

Output: 19


Input: Consider Input: Megan had 217 markers . Robert gave her 109 more markers . How many markers does Megan have altogether ?

Output: 326


Input: Consider Input: Nancy 's class is going on a field trip to the zoo . If each van can hold 5 people and there are 12 students and 3 adults going , how many vans will they need ?


Output: 3