Y \ X
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
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
4160
4159
4158
4157
4156
4155
4154
4153
4152
4151
4150
4149
4148
4147
4146
4145
4144
4143
4142
4141
4140