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
13230
13229
13228
13227
13226
13225
13224
13223
13222
13221
13220
13219
13218
13217
13216
13215
13214
13213
13212
13211
13210