goto-student-feedback.el

(defun goto-student-feedback ()
  (interactive)
  (string-match
            (rx (group "hw" digit) (any ascii) (group "cs30f" (1+ alpha)))
            (buffer-file-name))

  (let* (
        (hwnum (match-string 1 (buffer-file-name)))
        (username (match-string 2 (buffer-file-name)))
        (feedback-path (concat "/home/linux/ieng6/cs30f/public/" hwnum "_feedback/style_feedback_" username))
        )
    (message feedback-path)
    (find-file-other-window feedback-path)
    )
  )