Y \ X
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
4660
4659
4658
4657
4656
4655
4654
4653
4652
4651
4650
4649
4648
4647
4646
4645
4644
4643
4642
4641
4640