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
13210
13209
13208
13207
13206
13205
13204
13203
13202
13201
13200
13199
13198
13197
13196
13195
13194
13193
13192
13191
13190