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
12030
12029
12028
12027
12026
12025
12024
12023
12022
12021
12020
12019
12018
12017
12016
12015
12014
12013
12012
12011
12010