Print or return this exact text:
```
0
0 0
0 1 0
0 1 1 0
0 1 2 1 0
0 1 2 2 1 0
0 1 2 3 2 1 0
0 1 2 3 3 2 1 0
0 1 2 3 4 3 2 1 0
0 1 2 3 4 4 3 2 1 0
0 1 2 3 4 5 4 3 2 1 0
0 1 2 3 4 5 5 4 3 2 1 0
0 1 2 3 4 5 6 5 4 3 2 1 0
0 1 2 3 4 5 6 6 5 4 3 2 1 0
0 1 2 3 4 5 6 7 6 5 4 3 2 1 0
0 1 2 3 4 5 6 7 7 6 5 4 3 2 1 0
0 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 0
0 1 2 3 4 5 6 7 8 8 7 6 5 4 3 2 1 0
0 1 2 3 4 5 6 7 8 9 8 7 6 5 4 3 2 1 0
0 1 2 3 4 5 6 7 8 8 8 8 7 6 5 4 3 2 1 0
0 1 2 3 4 5 6 7 7 7 7 7 7 7 6 5 4 3 2 1 0
0 1 2 3 4 5 6 6 6 6 6 6 6 6 6 6 5 4 3 2 1 0
0 1 2 3 4 5 5 5 5 5 5 5 5 5 5 5 5 5 4 3 2 1 0
0 1 2 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 3 2 1 0
0 1 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2 1 0
0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
```
The number represents the distance of the cell from the closest edge.
Trailing whitespace on each line is acceptable. A newline on the last line is optional.
