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
12620
12619
12618
12617
12616
12615
12614
12613
12612
12611
12610
12609
12608
12607
12606
12605
12604
12603
12602
12601
12600