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
12760
12759
12758
12757
12756
12755
12754
12753
12752
12751
12750
12749
12748
12747
12746
12745
12744
12743
12742
12741
12740