Y \ X
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
8000
7999
7998
7997
7996
7995
7994
7993
7992
7991
7990
7989
7988
7987
7986
7985
7984
7983
7982
7981
7980