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.

Example input: Context: Sam is 6 feet tall and Alex is 5 feet tall 

 Question: By how many feet is Sam taller than Alex? 
Example output: 1
Example explanation:  Sam's height - Alex's height = 6-5 = 1
Q: Context: Paco had 39 sweet cookies and 6 salty cookies. He ate 23 salty cookies and 32 sweet cookies. 

 Question: How many more sweet cookies than salty cookies did he eat?
A:
9