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
5040
5039
5038
5037
5036
5035
5034
5033
5032
5031
5030
5029
5028
5027
5026
5025
5024
5023
5022
5021
5020