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
10210
10209
10208
10207
10206
10205
10204
10203
10202
10201
10200
10199
10198
10197
10196
10195
10194
10193
10192
10191
10190