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
10830
10829
10828
10827
10826
10825
10824
10823
10822
10821
10820
10819
10818
10817
10816
10815
10814
10813
10812
10811
10810