Y \ X
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
10600
10599
10598
10597
10596
10595
10594
10593
10592
10591
10590
10589
10588
10587
10586
10585
10584
10583
10582
10581
10580