Y \ X
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
13640
13639
13638
13637
13636
13635
13634
13633
13632
13631
13630
13629
13628
13627
13626
13625
13624
13623
13622
13621
13620