521
1831
0
0
520
1832
2
0
519
1832
1
0
518
1833
2
0
517
1834
1
0
516
1834
1
0
515
1842
1
0
514
1843
2
0
513
1844
0
0
512
1845
0
0
511
1852
0
0
510
1853
1
0
509
1857
0
0
508
1858
2
0
507
1862
0
0
506
1865
1
0
505
1866
0
0
504
1869
2
0
503
1876
0
0
502
1879
1
0
501
1882
2
0
500
1883
2
0
499
1884
2
0
498
1893
0
0
497
1896
2
0
496
1896
0
0
495
1899
1
0
494
1900
2
0
493
1902
2
0
492
1902
2
0