1                             ....
 2              $2.',:clooo:  $1.:looooo:.
 3           $2.;looooooooc  $1.oooooooooo'
 4        $2.;looooool:,''.  $1:ooooooooooc
 5       $2;looool;.         $1'oooooooooo,
 6      $2;clool'             $1.cooooooc.  $2,,
 7         $2...                $1......  $2.:oo,
 8  $1.;clol:,.                        $2.loooo'
 9 $1:ooooooooo,                        $2'ooool
10$1'ooooooooooo.                        $2loooo.
11$1'ooooooooool                         $2coooo.
12 $1,loooooooc.                        $2.loooo.
13   $1.,;;;'.                          $2;ooooc
14       $2...                         $2,ooool.
15    $2.cooooc.              $1..',,'.  $2.cooo.
16      $2;ooooo:.           $1;oooooooc.  $2:l.
17       $2.coooooc,..      $1coooooooooo.
18         $2.:ooooooolc:. $1.ooooooooooo'
19           $2.':loooooo;  $1,oooooooooc
20               $2..';::c'  $1.;loooo:'