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
4710
4709
4708
4707
4706
4705
4704
4703
4702
4701
4700
4699
4698
4697
4696
4695
4694
4693
4692
4691
4690