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
10750
10749
10748
10747
10746
10745
10744
10743
10742
10741
10740
10739
10738
10737
10736
10735
10734
10733
10732
10731
10730