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

if __name__ == "__main__":
	n = raw_input()
	m = input()
	n = int(n[::-1][0])
	a = n
	nums = [n]
	i = 1
	while i <= m:
		a *= n
		a = int(str(a)[::-1][0])
		if a == n:
			break
		nums.append(a)
		i += 1
	temp = m % i
	print nums[temp-1]