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
10570
10569
10568
10567
10566
10565
10564
10563
10562
10561
10560
10559
10558
10557
10556
10555
10554
10553
10552
10551
10550