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
9920
9919
9918
9917
9916
9915
9914
9913
9912
9911
9910
9909
9908
9907
9906
9905
9904
9903
9902
9901
9900