north: 80 south: 0 east: 100 west: 0 rows: 8 cols: 10 * * * * * * * * * * 4 5 6 7 8 9 10 11 12 13 5 6 7 8 9 10 11 12 13 14 6 7 8 9 10 11 12 13 14 15 * * * * * * * * * * 8 9 10 11 12 13 14 15 16 17 9 10 11 12 13 14 15 16 17 18 10 11 12 13 14 15 16 17 18 19
