#sorry

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
g = s.to_i
n = g

while true 
  y = Time.now()
  if y-x > 0.900 then
    break
  end
  for i in 0..10 do
    a = rand(0...len)
    b = rand(0...len)
    u = (n/(10**a))%10
    v = (n/(10**b))%10

    n = n + (v-u)*(10**a) + (u-v)*(10**b)
    g = gcd(g, n)
  end
  if g == 1 then
    break
  end
end

puts g