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
12390
12389
12388
12387
12386
12385
12384
12383
12382
12381
12380
12379
12378
12377
12376
12375
12374
12373
12372
12371
12370