(defun seek-backward-to-char (chr)
  "Seek backwards to a character"
  (interactive "cSeek back to char: ")
  (while (not (= (char-after) chr))
    (forward-char -1)))


(defun delete-between-pair (char)
  "Delete in between the given pair"
  (interactive "cDelete between char: ")
  (seek-backward-to-char char)
  (forward-char 1)
  (zap-to-char 1 char)
  (insert char)
  (forward-char -1))