N = list(map(int, list(input())))
M = list(map(int, list(input())))

n = N[-1]
if len(M) >= 3:
    m = M[-1] % 4 + 100
elif len(M) == 2:
    m = M[0] * 10 + M[1]
else:
    m = M[0]
print(pow(n, m, 10))