a = int(input()[-1])
m = int(input())
if m == 0:
    print(1)
else:
    li = [a ** (i + 1) for i in range(4)]
    li = list(map(lambda x: x % 10, li))
    # print(li)
    print(li[(m - 1 + 4) % 4] % 10)