def main():
    N = int(input())
    M = int(input())

    match N % 10:
        case 0:
            print(0)
        case 1:
            print(1)
        case 2:
            match M % 4:
                case 0:
                    print(2)
                case 1:
                    print(4)
                case 2:
                    print(8)
                case 3:
                    print(6)
        case 3:
            match M % 4:
                case 0:
                    print(3)
                case 1:
                    print(9)
                case 2:
                    print(7)
                case 3:
                    print(1)
        case 4:
            match M % 2:
                case 0:
                    print(4)
                case 1:
                    print(6)
        case 5:
            print(5)
        case 6:
            print(6)
        case 7:
            match M % 4:
                case 0:
                    print(7)
                case 1:
                    print(9)
                case 2:
                    print(3)
                case 3:
                    print(1)
        case 8:
            match M % 4:
                case 0:
                    print(8)
                case 1:
                    print(4)
                case 2:
                    print(2)
                case 3:
                    print(6)
        case 9:
            match M % 2:
                case 0:
                    print(9)
                case 1:
                    print(1)


if __name__ == "__main__":
    main()