n=list(input())
m=list(input())

if len(m)==1 and m[0]=='0':
  print(1)
  exit()

n=int(n[-1])
l=[n]
for i in range(100):
  if l[-1]*n%10!=l[0]:
    l.append(l[-1]*n%10)
  else:
    break

ct=0
m.reverse()
for i in range(len(m)):
  ct+=int(m[i])*pow(10,i,len(l))
  ct%=len(l)

print(l[(ct-1)%len(l)])