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
11550
11549
11548
11547
11546
11545
11544
11543
11542
11541
11540
11539
11538
11537
11536
11535
11534
11533
11532
11531
11530