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
7370
7369
7368
7367
7366
7365
7364
7363
7362
7361
7360
7359
7358
7357
7356
7355
7354
7353
7352
7351
7350