Y \ X
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
11010
11009
11008
11007
11006
11005
11004
11003
11002
11001
11000
10999
10998
10997
10996
10995
10994
10993
10992
10991
10990