north: 80
south: 0
east: 120
west: 0
rows: 11
cols: 16
* * * * * * * * * * * * * * * * 
8 9 9 10 11 12 12 13 14 15 15 16 17 18 18 19 
8 9 9 10 11 12 12 13 14 15 15 16 17 18 18 19 
9 10 10 11 12 13 13 14 15 16 16 17 18 19 19 20 
10 11 11 12 13 14 14 15 16 17 17 18 19 20 20 21 
10 11 11 12 13 14 14 15 16 17 17 18 19 20 20 21 
* * * * * * * * * * * * * * * * 
12 13 13 14 15 16 16 17 18 19 19 20 21 22 22 23 
13 14 14 15 16 17 17 18 19 20 20 21 22 23 23 24 
13 14 14 15 16 17 17 18 19 20 20 21 22 23 23 24 
14 15 15 16 17 18 18 19 20 21 21 22 23 24 24 25