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
11080
11079
11078
11077
11076
11075
11074
11073
11072
11071
11070
11069
11068
11067
11066
11065
11064
11063
11062
11061
11060