The task is to generate the correct answer for a given math problem.

Input: Consider Input: Problem: what is the sum of the odd integers from 55 to 75 , inclusive ?

Output: 71


Input: Consider Input: Problem: 30 pens and 75 pencils were purchased for 750 . if the average price of a pencil was 2.00 , find the average price of a pen .

Output: 20


Input: Consider Input: Problem: annie and sam set out together on bicycles traveling at 15 and 12 km per hour respectively . after 40 minutes , annie stops to fix a flat tire . if it takes annie 30 minutes to fix the flat tire and sam continues to ride during this time , how many minutes will it take annie to catch up with sam assuming that annie resumes riding at 15 km per hour ?


Output: 80