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
9780
9779
9778
9777
9776
9775
9774
9773
9772
9771
9770
9769
9768
9767
9766
9765
9764
9763
9762
9761
9760