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
10180
10179
10178
10177
10176
10175
10174
10173
10172
10171
10170
10169
10168
10167
10166
10165
10164
10163
10162
10161
10160