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: Paco had 26 salty cookies and 17 sweet cookies. He ate 14 sweet cookies and 9 salty cookies. 

 Question: How many salty cookies did Paco have left?

Ex Output:
17


Ex Input:
Context: Mary is baking a cake. The recipe calls for 12 cups of flour 14 cups of sugar and 7 cups of salt. She already put in 2 cups of flour. 

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

Ex Output:
3


Ex Input:
Context: 62 campers went rowing in the morning. 39 campers went rowing in the afternoon. 

 Question: How many more campers went rowing in the morning than in the afternoon?

Ex Output:

23