s = gets.chomp
@h = {}

def f(s, t)
  n = s.size

  if n == 1
    @h[t + s[0]] = 1
  else
    f(s[1, n - 1], t + s[0])
    f(s[0, n - 1], t + s[-1])
  end
end

f(s, '')

puts @h.size