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
9700
9699
9698
9697
9696
9695
9694
9693
9692
9691
9690
9689
9688
9687
9686
9685
9684
9683
9682
9681
9680