Y \ X
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
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
3370
3369
3368
3367
3366
3365
3364
3363
3362
3361
3360
3359
3358
3357
3356
3355
3354
3353
3352
3351
3350