(defun main ()
  (let* ((n (read))
         (m (read))
         (a (make-array n)))

    ;; 入力を読み込む
    (dotimes (i n)
      (setf (aref a i) (read)))

    (let ((i 0))
      (loop while (< i n)
            do (when (oddp (aref a i))
                 (let ((ans (aref a i))
                       (ct 1)
                       (j (1+ i)))
                   (loop while (and (< j n) (oddp (aref a j)))
                         do (progn
                              (incf ct)
                              (incf ans (aref a j))
                              (incf j)))
                   (when (>= ct m)
                     (format t "~a~%" ans))
                   (setf i j)))
            (incf i)))))

;; Call the main function
(main)