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
15300
15299
15298
15297
15296
15295
15294
15293
15292
15291
15290
15289
15288
15287
15286
15285
15284
15283
15282
15281
15280