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: 3 birds and 4 storks were sitting on the fence. 2 more birds came to join them.

Question: How many more birds than storks are sitting on the fence?
Example Output: 1

Example Input: Context: 2 children were riding on the bus. At the bus stop some more children got on the bus. Then there were 10 children altogether on the bus.

Question: How many more children are on the bus now than there were before the bus stop?
Example Output: 8

Example Input: Context: There were 106 dollars in Olivia's wallet. After she visited a supermarket and a showroom there were 26 dollars left. If she spent 49 dollars at the showroom

Question: How much did she spend at the supermarket?
Example Output:
31