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
13820
13819
13818
13817
13816
13815
13814
13813
13812
13811
13810
13809
13808
13807
13806
13805
13804
13803
13802
13801
13800