Y \ X
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
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
8570
8569
8568
8567
8566
8565
8564
8563
8562
8561
8560
8559
8558
8557
8556
8555
8554
8553
8552
8551
8550