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
13360
13359
13358
13357
13356
13355
13354
13353
13352
13351
13350
13349
13348
13347
13346
13345
13344
13343
13342
13341
13340