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
12640
12639
12638
12637
12636
12635
12634
12633
12632
12631
12630
12629
12628
12627
12626
12625
12624
12623
12622
12621
12620