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
7100
7099
7098
7097
7096
7095
7094
7093
7092
7091
7090
7089
7088
7087
7086
7085
7084
7083
7082
7081
7080