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
12650
12649
12648
12647
12646
12645
12644
12643
12642
12641
12640
12639
12638
12637
12636
12635
12634
12633
12632
12631
12630