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
5860
5859
5858
5857
5856
5855
5854
5853
5852
5851
5850
5849
5848
5847
5846
5845
5844
5843
5842
5841
5840