Tavak and Seyyed are good friends. Seyyed is very funny and he told Tavak to solve the following problem instead of longest-path.

You are given l and r. For all integers from l to r, inclusive, we wrote down all of their integer divisors except 1. Find the integer that we wrote down the maximum number of times.

Solve the problem to show that it's not a NP problem.

The first line contains two integers l and r (2 \le l \le r \le 109).

Print single integer, the integer that appears maximum number of times in the divisors.

If there are multiple answers, print any of them.

Definition of a divisor: https://www.mathsisfun.com/definitions/divisor-of-an-integer-.html

The first example: from 19 to 29 these numbers are divisible by 2: {20,22,24,26,28}.

The second example: from 3 to 6 these numbers are divisible by 3: {3,6}.