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
13770
13769
13768
13767
13766
13765
13764
13763
13762
13761
13760
13759
13758
13757
13756
13755
13754
13753
13752
13751
13750