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
9050
9049
9048
9047
9046
9045
9044
9043
9042
9041
9040
9039
9038
9037
9036
9035
9034
9033
9032
9031
9030