Y \ X
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
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
14770
14769
14768
14767
14766
14765
14764
14763
14762
14761
14760
14759
14758
14757
14756
14755
14754
14753
14752
14751
14750