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.

Ex Input:
Context: Bobby had 22 pieces of candy. He ate some pieces of candy. Then he ate 5 more. If he still has 8 pieces of candy left 

 Question: How many pieces of candy had he eaten at the start?

Ex Output:
9


Ex Input:
Context: Jessica cut some roses from her flower garden to put in her vase. There are now 19 roses in the vase. If there were 3 roses in the vase initially 

 Question: How many roses did she cut?

Ex Output:
16


Ex Input:
Context: Bobby had 21 pieces of candy. He ate 5 pieces of candy. Then he ate 9 more. 

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

Ex Output:

7