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: While shopping , Maria bought 35 green towels and 21 white towels . If she gave her mother 34 of them , how many towels did Maria end up with ?

Output: 22


Input: Consider Input: At the fair there were 7 people in line for the bumper cars . If 4 of them got tired of waiting and left and 8 more got in line , how many people would be in line ?

Output: 11


Input: Consider Input: A pet store has 9 bird cages . If each cage has 2 parrots and 6 parakeets in it , how many birds does the pet store have total ?


Output: 72