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
8270
8269
8268
8267
8266
8265
8264
8263
8262
8261
8260
8259
8258
8257
8256
8255
8254
8253
8252
8251
8250