Oranges and Apples

Description:

Input:

The first input line contains one number T — amount of tests. The description of each test starts with a natural number N — amount of boxes. Each of the following 2N - 1 lines contains numbers a_i and o_i — amount of apples and oranges in the i-th box (0 ≤ a_i, o_i ≤ 10⁹). The sum of N in all the tests in the input doesn't exceed 10⁵. All the input numbers are integer.

Output:

For each test output two lines. In the first line output YES, if it's possible to choose N boxes, or NO otherwise. If the answer is positive output in the second line N numbers — indexes of the chosen boxes. Boxes are numbered from 1 in the input order. Otherwise leave the second line empty. Separate the numbers with one space.

Sample Input:

2
2
10 15
5 7
20 18
1
0 0

Sample Output:

YES
1 3
YES
1