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
12670
12669
12668
12667
12666
12665
12664
12663
12662
12661
12660
12659
12658
12657
12656
12655
12654
12653
12652
12651
12650