import java.util.Scanner;
import java.math.BigInteger;

public class Yuki442{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long a = sc.nextLong();
    long b = sc.nextLong();
    String s_a = Long.toString(a);
    String s_b = Long.toString(b);
    BigInteger big_a = new BigInteger(s_a);
    BigInteger big_b = new BigInteger(s_b);
    BigInteger big_c = big_a;
    big_c = big_c.add(big_b);
    BigInteger big_d = big_a;
    big_d = big_d.multiply(big_b);
    BigInteger big_e = big_c;
    big_e = big_e.gcd(big_d);
    long c = big_e.longValue();
    System.out.println(c);
  }
}