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
12070
12069
12068
12067
12066
12065
12064
12063
12062
12061
12060
12059
12058
12057
12056
12055
12054
12053
12052
12051
12050