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
5660
5659
5658
5657
5656
5655
5654
5653
5652
5651
5650
5649
5648
5647
5646
5645
5644
5643
5642
5641
5640