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
9010
9009
9008
9007
9006
9005
9004
9003
9002
9001
9000
8999
8998
8997
8996
8995
8994
8993
8992
8991
8990