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
13220
13219
13218
13217
13216
13215
13214
13213
13212
13211
13210
13209
13208
13207
13206
13205
13204
13203
13202
13201
13200