(defvar temp)
(defvar N)
(defvar K)
(defvar S)
(setq temp (read-from-string (concatenate 'string "(" (read-line) ")")))
(setq N (nth 0 temp))
(setq K (nth 1 temp))

(setq S nil)
(defparameter cnt 1)
(loop for char = (read-char nil nil) do
        (if (char= char #\Newline) (return))
        (if (char= char #\() (push cnt S))
        (if (char= char #\))
                (progn
                (if (= (car S) K) (progn (format t "~d~%" cnt) (quit)))
                (if (= K cnt)    (progn (format t "~d~%" (car S)) (quit)))
                (pop S))
        )

        (incf cnt)
)