Y \ X
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
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
4650
4649
4648
4647
4646
4645
4644
4643
4642
4641
4640
4639
4638
4637
4636
4635
4634
4633
4632
4631
4630