You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Input: Consider Input: For a birthday party George bought 10 regular sodas and 22 diet sodas . If his fridge would only hold 4 on each shelf , how many shelves would he fill up ?

Output: 8


Input: Consider Input: A vase can hold 5 flowers . If you had 6 carnations and 19 roses , how many vases would you need to hold the flowers ?

Output: 5


Input: Consider Input: A restaurant served 4 pies during lunch and 9 during dinner today . The restaurant served 7 pies and 2 pizzas yesterday . How many pies were served in total ?


Output: 20