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
13380
13379
13378
13377
13376
13375
13374
13373
13372
13371
13370
13369
13368
13367
13366
13365
13364
13363
13362
13361
13360