(defun main ()
  (let* ((n (read))
         (m (read))
         (a (loop for i from 1 to n collect (read))))

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

;; Call the main function
(main)