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:
Bobby collects 2 blocks . Bobby 's father gives Bobby 6 more . How many blocks does Bobby have ?

Ex Output:
8


Ex Input:
There were 58 geese and 37 ducks in the marsh . How many birds were in the marsh ?

Ex Output:
95


Ex Input:
Dave had to wash 9 short sleeve shirts and 27 long sleeve shirts before school . If he had only washed 20 of them by the time school started , how many did he not wash ?

Ex Output:

16