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
7200
7199
7198
7197
7196
7195
7194
7193
7192
7191
7190
7189
7188
7187
7186
7185
7184
7183
7182
7181
7180