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
10770
10769
10768
10767
10766
10765
10764
10763
10762
10761
10760
10759
10758
10757
10756
10755
10754
10753
10752
10751
10750