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
5350
5349
5348
5347
5346
5345
5344
5343
5342
5341
5340
5339
5338
5337
5336
5335
5334
5333
5332
5331
5330