N=input()
N=int(N[-1])
M=input()
if len(M)>2:
  M=int(M[-2:])
else:
  M=int(M)
  if M==0:
    print(1)
    exit()
M+=4
a=1
for i in range(M):
    a*=N
    a%=10
print(a)