n = input()[-10:]
m = input()[-10:]

if m == '0':
    print(1)
    exit()
if m[0] == '0':
    m = '4'
n = int(n)
m = int(m)

if m > 4:
    m %= 4
    m += 4
n %= 10
print(pow(n, m, 10))