You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Input: Consider Input: Context: Bobby ate 17 pieces of candy. Then he ate 15 more. If he initially had 36 pieces of candy 

 Question: How many pieces of candy does he still have left?

Output: 4


Input: Consider Input: Context: Jake brought 6 balloons to the park. If Jake brought 4 more balloons than the number of balloons that Allan brought 

 Question: How many balloons did Allan bring to the park?

Output: 2


Input: Consider Input: Context: Mary is baking a cake. The recipe calls for 9 cups of flour and 11 cups of sugar. She already put in 4 cups of flour. 

 Question: How many more cups of sugar than cups of flour does she need to add now?


Output: 6