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
10830
10829
10828
10827
10826
10825
10824
10823
10822
10821
10820
10819
10818
10817
10816
10815
10814
10813
10812
10811
10810