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
9080
9079
9078
9077
9076
9075
9074
9073
9072
9071
9070
9069
9068
9067
9066
9065
9064
9063
9062
9061
9060