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
11480
11479
11478
11477
11476
11475
11474
11473
11472
11471
11470
11469
11468
11467
11466
11465
11464
11463
11462
11461
11460