Y \ X
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
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
13860
13859
13858
13857
13856
13855
13854
13853
13852
13851
13850
13849
13848
13847
13846
13845
13844
13843
13842
13841
13840