# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N = input()
	n = int(N[-1])
	M = int(input())
	ans = pow(n, M, 10)
	print(ans)
	

if __name__ == '__main__':
	main()