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
12910
12909
12908
12907
12906
12905
12904
12903
12902
12901
12900
12899
12898
12897
12896
12895
12894
12893
12892
12891
12890