N = int(input())
M = int(input())

x = int(str(N)[-1])
a = []
i = 1
while len(a) == len(set(a)):
    a.append(int(str(x ** i)[-1]))
    i += 1
a.pop()

if M < 2:
    print(N ** M % 10)
else:
    print(a[M % len(a) - 1])