private static void registerCorners(String list) {
char horizontal = list.charAt(0);
char vertical = list.charAt(1);
registerCorner(NONE, vertical, NONE, horizontal, list.charAt(2));
registerCorner(NONE, vertical, horizontal, NONE, list.charAt(3));
registerCorner(vertical, NONE, NONE, horizontal, list.charAt(4));
registerCorner(vertical, NONE, horizontal, NONE, list.charAt(5));
registerCorner(vertical, vertical, NONE, horizontal, list.charAt(6));
registerCorner(vertical, vertical, horizontal, NONE, list.charAt(7));
registerCorner(NONE, vertical, horizontal, horizontal, list.charAt(8));
registerCorner(vertical, NONE, horizontal, horizontal, list.charAt(9));
registerCorner(vertical, vertical, horizontal, horizontal, list.charAt(10));
}