import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input()[-1])
m=input()
if m=="0":
  print(1)
else:
  if n in (0,1,5,6):
    print(n)
  else:
    if len(m)==1:
      m=int(m)
    else:
      m=int(m[-2:])
      if m==0:
        m=100
    if n==2:
      A=[2,4,8,6]
      print(A[(m-1)%4])
    elif n==3:
      A=[3,9,7,1]
      print(A[(m-1)%4])
    elif n==4:
      A=[4,6]
      print(A[(m-1)%2])
    elif n==7:
      A=[7,9,3,1]
      print(A[(m-1)%4])
    elif n==8:
      A=[8,4,2,6]
      print(A[(m-1)%4])
    else:
      A=[9,1]
      print(A[(m-1)%2])