^~~.......                                          .......~~^
~~........                                          ........~~
~.........                                          .........~
..........                                          ..........
..........                                          ..........
..........                                          ..........
..........                                          ..........
..........                                          ..........
~.........                                          .........~
~~........                                          ........~~
^~~.......                                          .......~~^