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

Input: Consider Input: Problem: a train 200 m long can cross an electric pole in 5 sec and then find the speed of the train ?

Output: 144


Input: Consider Input: Problem: if p represents the product of the first 16 positive integers , then p is not a multiple of

Output: 5


Input: Consider Input: Problem: the ratio between the present ages of a and b is 5 : 3 respectively . the ratio between a ' s age 4 years ago and b ' s age 4 years hence is 1 : 1 . what is the ratio between a ' s age 4 years hence and b ' s age 4 years ago ?


Output: 3 : 1