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
9560
9559
9558
9557
9556
9555
9554
9553
9552
9551
9550
9549
9548
9547
9546
9545
9544
9543
9542
9541
9540