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
4770
4769
4768
4767
4766
4765
4764
4763
4762
4761
4760
4759
4758
4757
4756
4755
4754
4753
4752
4751
4750