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
num = s.to_big_i
s = s.chars.map &.to_i
n = s.size
if s.count(s[0]) == n
  puts s.join
  exit
end

g = 0
s.each { |i|
  s.each { |j|
    g = g.gcd(9*(i - j)) if i > j
  }
}

p num.gcd(g)