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
9590
9589
9588
9587
9586
9585
9584
9583
9582
9581
9580
9579
9578
9577
9576
9575
9574
9573
9572
9571
9570