Y \ X
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
2720
2719
2718
2717
2716
2715
2714
2713
2712
2711
2710
2709
2708
2707
2706
2705
2704
2703
2702
2701
2700