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
6000
5999
5998
5997
5996
5995
5994
5993
5992
5991
5990
5989
5988
5987
5986
5985
5984
5983
5982
5981
5980