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
3650
3649
3648
3647
3646
3645
3644
3643
3642
3641
3640
3639
3638
3637
3636
3635
3634
3633
3632
3631
3630