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: At the beach , Miki and her sister both built sandcastles and then measured their heights . Miki 's sandcastle was 0.8333333333333334 foot tall and her sister 's was 0.5 foot tall . How much taller was Miki 's sandcastle than her sister 's ?

Output: 0.3333333333333333


Input: Consider Input: Brandon has 96 Skittles . Bonnie has 4 Skittles . He loses 9 . How many Skittles will Brandon have ?

Output: 87


Input: Consider Input: For homework Faye had 13 math problems and 2 spelling problems . If she can finish 3 problems in an hour how long will it take her to finish all the problems ?


Output: 5