def solve():
    N = input()
    M = input()

    if M == '0':
        print(1)
        return

    n = int(N[-1])
    m = int(M[-2:])

    m %= 4
    if m == 0:
        m = 4

    ans = (n ** m) % 10

    print(ans)


if __name__ == '__main__':
    solve()