Y \ X
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
10070
10069
10068
10067
10066
10065
10064
10063
10062
10061
10060
10059
10058
10057
10056
10055
10054
10053
10052
10051
10050