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

Input: Consider Input: Problem: what is the greatest prime factor of 2 ^ 10 - 1 ?

Output: 3


Input: Consider Input: Problem: what is the 149 th digit to the right of the decimal point in the decimal form of 30 / 33 ?

Output: 9


Input: Consider Input: Problem: the average of 5 consecutive odd numbers a , b , c , d and e is 13 . what percent of b is c ?


Output: 118.2