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
9820
9819
9818
9817
9816
9815
9814
9813
9812
9811
9810
9809
9808
9807
9806
9805
9804
9803
9802
9801
9800