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
11910
11909
11908
11907
11906
11905
11904
11903
11902
11901
11900
11899
11898
11897
11896
11895
11894
11893
11892
11891
11890