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

Input: Consider Input: Problem: 12 men work 8 hours per day to complete the work in 10 days . to complete the same work in 8 days , working 15 hours a day , the number of men required ?

Output: 8 days


Input: Consider Input: Problem: how many integers n are prime numbers in the range 200 < n < 220 ?

Output: 1


Input: Consider Input: Problem: a train which has 390 m long , is running 45 kmph . in what time will it cross a person moving at 9 kmph in same direction ?


Output: 39 sec