lib C
  fun strtoll(s : UInt8*, p : UInt8**, b : Int32) : Int64
end

class String
  def to_i64
    C.strtoll(self, nil, 10)
  end
end

require "big"

s = read_line
a = s.chars.map(&.to_i).sort
n = a.size

g = 0
(0...n).each { |i|
  (i + 1...n).each { |j|
    g = g.gcd(9*(a[j] - a[i])) if a[j] != a[i]
  }
}
if g == 0
  puts s
else
  puts s.to_big_i.gcd(g)
end