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
12600
12599
12598
12597
12596
12595
12594
12593
12592
12591
12590
12589
12588
12587
12586
12585
12584
12583
12582
12581
12580