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
8350
8349
8348
8347
8346
8345
8344
8343
8342
8341
8340
8339
8338
8337
8336
8335
8334
8333
8332
8331
8330