import sys
sys.set_int_max_str_digits(0)
N = input()
M = input()

if M == "0":
  print(1)
  exit()
if N == "0":
  print(0)
  exit()

N = int(N[-1])
if len(M) > 1:
  M = int(M[-2:])
else:
  M = int(M[-1])

ans = pow(N, M, 10)
print(ans)