Y \ X
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
11600
11599
11598
11597
11596
11595
11594
11593
11592
11591
11590
11589
11588
11587
11586
11585
11584
11583
11582
11581
11580