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
4790
4789
4788
4787
4786
4785
4784
4783
4782
4781
4780
4779
4778
4777
4776
4775
4774
4773
4772
4771
4770