Y \ X
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
4990
4989
4988
4987
4986
4985
4984
4983
4982
4981
4980
4979
4978
4977
4976
4975
4974
4973
4972
4971
4970