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
10670
10669
10668
10667
10666
10665
10664
10663
10662
10661
10660
10659
10658
10657
10656
10655
10654
10653
10652
10651
10650