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
3230
3229
3228
3227
3226
3225
3224
3223
3222
3221
3220
3219
3218
3217
3216
3215
3214
3213
3212
3211
3210