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
14800
14799
14798
14797
14796
14795
14794
14793
14792
14791
14790
14789
14788
14787
14786
14785
14784
14783
14782
14781
14780