(defun dfs (i j p s res)
  (if (= i j)
      (setf (gethash (concatenate 'string p (string (char s i))) res) p)
      (progn
       (dfs (1+ i) j (concatenate 'string p (string (char s i))) s res)
       (dfs i (1- j) (concatenate 'string p (string (char s j))) s res))))

(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((s (read-line))
         (res (make-hash-table :test 'equal)))
    (dfs 0 (1- (length s)) "" s res)
    (format t "~D~%" (hash-table-count res))))

(main)