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
12430
12429
12428
12427
12426
12425
12424
12423
12422
12421
12420
12419
12418
12417
12416
12415
12414
12413
12412
12411
12410