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
2870
2869
2868
2867
2866
2865
2864
2863
2862
2861
2860
2859
2858
2857
2856
2855
2854
2853
2852
2851
2850