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

Ex Input:
Problem: a hiker walking at a constant rate of 4 kilometers per hour is passed by a cyclist travelling in the same direction along the same path at a constant rate of 30 kilometers per hour . the cyclist stops and waits for the hiker 5 minutes after passing her while the hiker continues to walk at her constant rate . how many minutes must the cyclist wait until the hiker catches up ?

Ex Output:
32.


Ex Input:
Problem: if p and q are both odd prime numbers andp < q , then how many different positive integer factors does 2 pqhave ?

Ex Output:
8


Ex Input:
Problem: how many positive even integers less than 100 contain digits 5 or 7 ?

Ex Output:

10