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
6240
6239
6238
6237
6236
6235
6234
6233
6232
6231
6230
6229
6228
6227
6226
6225
6224
6223
6222
6221
6220