Y \ X
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
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
12910
12909
12908
12907
12906
12905
12904
12903
12902
12901
12900
12899
12898
12897
12896
12895
12894
12893
12892
12891
12890