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
7400
7399
7398
7397
7396
7395
7394
7393
7392
7391
7390
7389
7388
7387
7386
7385
7384
7383
7382
7381
7380