import java.math.BigInteger;
import java.util.Scanner;
class B{
	static Scanner s = new Scanner(System.in);
	public static void main(String[] args) {
		BigInteger a=s.nextBigInteger(), b=s.nextBigInteger(),
		s = a.add(b),
		p = a.multiply(b);
		System.out.println(s.gcd(p));
	}
}