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
11680
11679
11678
11677
11676
11675
11674
11673
11672
11671
11670
11669
11668
11667
11666
11665
11664
11663
11662
11661
11660