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
2950
2949
2948
2947
2946
2945
2944
2943
2942
2941
2940
2939
2938
2937
2936
2935
2934
2933
2932
2931
2930