Y \ X
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
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
12250
12249
12248
12247
12246
12245
12244
12243
12242
12241
12240
12239
12238
12237
12236
12235
12234
12233
12232
12231
12230