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
4700
4699
4698
4697
4696
4695
4694
4693
4692
4691
4690
4689
4688
4687
4686
4685
4684
4683
4682
4681
4680