1                $1+++++++++++
 2            +++++++++++++++++++++
 3        +++++++++++++++++++++++++++++++
 4=+++++++++++++++++++++++++++++++++++++++=
 5+++++++++++++++++++++++++++++++++++++++++++++
 6=++++++++++++++++++++++++++++++++++++++++++++
 7    ==+++++++++++++++++++++++++++++++++==
 8        +++++++++++++++++++++++++++
 9$2****          $1++=+++++++++++=++          $2****
10**********         $1+++++++         $2**********
11**************               **************
12    ****************   ****************
13            ***********************
14******          *************          ******
15***********          ***          ***********
16***************           ***************
17        *************** ***************
18            *********************
19                ***********