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: 43 children were riding on the bus. At the bus stop some children got off the bus. Then there were 21 children left on the bus. 

 Question: How many children got off the bus at the bus stop?

Output: 22


Input: Consider Input: Context: The grasshopper, the frog and the mouse had a jumping contest. The grasshopper jumped 39 inches. The grasshopper jumped 19 inches farther than the frog and the mouse jumped 12 inches lesser than the frog. 

 Question: How far did the mouse jump?

Output: 8


Input: Consider Input: Context: For Gwen's birthday she received 8 dollars from her mom. Her dad gave her 5 more dollars. If she spent 4 dollars. 

 Question: How much more money did she receive from her mom than she did from her dad?


Output: 3