s = gets.chomp
def f(s)
  return [s] if s.length == 1
  arr = []
  f(s[1..-1]).each do |_s|
    arr << (s[0] + _s)
  end
  f(s[0..-2]).each do |_s|
    arr << (s[-1] + _s)
  end
  return arr.uniq
end
puts f(s).count