import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String N = sc.next(), M = sc.next();
        sc.close();
        int N_length = N.length(), M_length = M.length(), tmp;
        if (M.charAt(0) == '0') System.out.print(1);
        else if (N.charAt(N_length - 1) == '0') System.out.print(0);
        else {
            if (N.charAt(N_length - 1) == '1' || N.charAt(N_length - 1) == '5' || N.charAt(N_length - 1) == '6') System.out.print(N.charAt(N_length - 1));
            else if (N.charAt(N_length - 1) == '4' || N.charAt(N_length - 1) == '9') {
                if ((M.charAt(M_length - 1) - '0') % 2 == 0) {
                    if (N.charAt(N_length - 1) == '4') System.out.print(6);
                    else System.out.print(1);
                }
                else System.out.print(N.charAt(N_length - 1));
            }
            else {
                if (M_length == 1) tmp = M.charAt(0) - '0';
                else tmp = 10 * (M.charAt(M_length - 2) - '0') + M.charAt(M_length - 1) - '0';
                if (N.charAt(N_length - 1) == '2') {
                    if (tmp % 4 == 1) System.out.print(2);
                    else if (tmp % 4 == 2) System.out.print(4);
                    else if (tmp % 3 == 3) System.out.print(8);
                    else System.out.print(6);
                }
                else if (N.charAt(N_length - 1) == '3') {
                    if (tmp % 4 == 1) System.out.print(3);
                    else if (tmp % 4 == 2) System.out.print(9);
                    else if (tmp % 4 == 3) System.out.print(7);
                    else System.out.print(1);
                }
                else if (N.charAt(N_length - 1) == '7') {
                    if (tmp % 4 == 1) System.out.print(7);
                    else if (tmp % 4 == 2) System.out.print(9);
                    else if (tmp % 4 == 3) System.out.print(3);
                    else System.out.print(1);
                }
                else {
                    if (tmp % 4 == 1) System.out.print(8);
                    else if (tmp % 4 == 2) System.out.print(4);
                    else if (tmp % 4 == 3) System.out.print(2);
                    else System.out.print(6);
                }
            }
        }
    }
}