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
7070
7069
7068
7067
7066
7065
7064
7063
7062
7061
7060
7059
7058
7057
7056
7055
7054
7053
7052
7051
7050