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
13250
13249
13248
13247
13246
13245
13244
13243
13242
13241
13240
13239
13238
13237
13236
13235
13234
13233
13232
13231
13230