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:
Tommy had some balloons . His mom gave him 34 more balloons for his birthday . Then , Tommy had 60 balloons . How many balloons did Tommy have to start with ?

Ex Output:
26


Ex Input:
Connie had some marbles . She gave 73 to Juan . Now she has 70 marbles left . How many did she have to start with ?

Ex Output:
143


Ex Input:
Mrs. Hilt had 15 cents . She bought a pencil for 11 cents . How much money did she have left ?

Ex Output:

4