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
11860
11859
11858
11857
11856
11855
11854
11853
11852
11851
11850
11849
11848
11847
11846
11845
11844
11843
11842
11841
11840