# -*- coding: utf-8 -*-

N, = map(str, raw_input().split())
M, = map(str, raw_input().split())

n = int(N[-1]) # mod 10
m = int(M[-2:]) # mod 100
m = m % 4 # mod 4
if m == 0 and M != '0': m = 4

print n ** m % 10