21
1622 1626
1629
1633
1637
1641
1644 1648
1652
1656
0
1
1
2
2
2
3
3
3 22
1660 1663
1667
1671
1675
1679
1683 1687
1690
1694
0
1
1
2
2
2
3
3
3 23
1698 1702
1706
1710
1714
1718
1722 1726
1730
1734
0
1
1
2
2
2
3
3
4 24
1738 1742
1746
1750
1754
1758
1762 1766
1770
1774
0
1
1
2
2
2
3
3
4