#sorry
def main
  s = gets.chomp

  x = Time.now()

  def gcd(a,b)
    if b!=0 then
      return gcd(b, a%b)
    else
      return a
    end
  end

  len = s.length

  if len == 1 then
    puts s
    return
  end
  g = s.to_i
  n = g

  while true 
    y = Time.now()
    if y-x > 0.200 then
      break
    end
    if g == 1 then
      break
    end
    for i in 0..10 do
      for j in 0...5 do
        a = rand(0...len)
        b = rand(0...len)
        u = (n % (10**(a+1)) / (10**a))
        v = (n % (10**(b+1)) / (10**b))

        n = n + (v-u)*(10**a) + (u-v)*(10**b)
      end
      g = gcd(g, n)
    end
  end

  puts g
end

main()