}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)