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
10920
10919
10918
10917
10916
10915
10914
10913
10912
10911
10910
10909
10908
10907
10906
10905
10904
10903
10902
10901
10900