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
13710
13709
13708
13707
13706
13705
13704
13703
13702
13701
13700
13699
13698
13697
13696
13695
13694
13693
13692
13691
13690