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: A construction company is repaving a damaged road . So far , they have repaved a total of 4938 inches of the road . Today , they repaved 805 inches of the road . How many inches of the road had they repaved before today ?

Output: 4133


Input: Consider Input: Katie had 11 songs on her mp3 player . If she deleted 7 old songs from it and then added 24 new songs , how many songs does she have on her mp3 player ?

Output: 28


Input: Consider Input: Brad has 17 balloons . 8 balloons are red and the rest are green . How many green balloons does Brad have ?


Output: 9