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
5470
5469
5468
5467
5466
5465
5464
5463
5462
5461
5460
5459
5458
5457
5456
5455
5454
5453
5452
5451
5450