1                        ..........
 2                   .::::::::::::::::::..
 3               ..:::::::::::::::::::::::::.
 4                '::::::::::::::::::::::::::::.
 5                  ':::::''      '':::::::::::::.
 6$3         ..         $1'                '':::::::::.
 7$3        .||.                            $1':::::::::
 8$3       .|||||.                            $1'::::::::
 9$3      .|||||||:                             $1::::::::
10$3      |||||||:          $1.::::::::.           ::::::::
11$2 ######$3||||||'   $2##^ v##########v$1::. $2#####  #############v
12$2  ######$3||||| $2##^ v####$1::::::$2####v$1::$2#####  #####$1:::::$2#####
13$2   ######$3||$2##^   #####$1::::::$2#####$1::$2#####  #####$1:::::$2######
14$2    ######^$3||    $2#####$1:::::$2####^$1::$2#####  #####$1:::::$2#####^
15$2     ##^$3|||||    $2^###########^$1:::$2#####  ##############^
16$3      |||||||:          $1'::::::::'          .::::::::
17$3      '|||||||:                            $1.::::::::'
18$3       '|||||||:.                           $1'::::::
19$3        '||||||||:.                           $1':::
20$3         ':|||||||||.                .          $1'
21$3           '|||||||||||:...    ...:||||.
22             ':||||||||||||||||||||||||||.
23                ':|||||||||||||||||||||||''
24                   '':||||||||||||||:''
25                          ''''''