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
8740
8739
8738
8737
8736
8735
8734
8733
8732
8731
8730
8729
8728
8727
8726
8725
8724
8723
8722
8721
8720