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
9720
9719
9718
9717
9716
9715
9714
9713
9712
9711
9710
9709
9708
9707
9706
9705
9704
9703
9702
9701
9700