#+title: Solution to p5

First load the data as a list of cons cells (start . end)
#+begin_src emacs-lisp :results none
  (with-temp-buffer
    (insert-file-contents "input-test")
    (advent/replace-multiple-regex-buffer
     '(
       ("^\\([0-9]*\\)-\\([0-9]*\\)$" . "(\\1 . \\2)")
       ("^$" . ") ids '(")))
    (goto-char (point-min))
    (insert "(setq ranges '(")
    (goto-char (point-max))
    (insert "))")
    (eval-buffer))
#+end_src