n = int(input())
m = int(input())

n %= 10


if m == 0:
    ans = 1

else:

    for i in range(10):
        t = ( n ** (i+1) ) % 10
        print(t,m)
        if t == n and i != 0:
            f = i
            break

    m = m % f

    ans = (n**m)%10

print(ans)