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
15020
15019
15018
15017
15016
15015
15014
15013
15012
15011
15010
15009
15008
15007
15006
15005
15004
15003
15002
15001
15000