}3.2-1`11(2)
1
2(1)
2(2)
3(1)
3(2)
4(1)
4(2)
5(1)
5(2)
6(1)
6(2)
7(1)
7(2)
8(1)
8(2)
9(1)
9(2)
10(1)
10(2)
11(1)
11(2)