Y \ X
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
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
12890
12889
12888
12887
12886
12885
12884
12883
12882
12881
12880
12879
12878
12877
12876
12875
12874
12873
12872
12871
12870