Sexy Primes
Easy Accuracy: 12.49% Submissions: 2810 Points: 2

Sexy primes are prime numbers that differ from each other by six. For example, the numbers 5 and 11 are both sexy primes, because they differ by 6. Given a range of the form [L, R]. The task is to print all the sexy prime pairs in the range in increasing order.

Input:
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case two integers L and R.

Output:
For each test case, print all the sexy prime pairs in the range in increasing order in new line. If no sexy prime pair is there print "-1".

Constraints:
1 <= T <= 100
1 <= L <= R <= 107

Example:
Input:

2
11 19
6 59
Output:

11 17 13 19
7 13 11 17 13 19 17 23 23 29 31 37 37 43 41 47 47 53 53 59

Explanation:

Input : L = 6, R = 59
Output : (7, 13) (11, 17) (13, 19)
(17, 23) (23, 29) (31, 37) (37, 43)
(41, 47) (47, 53) (53, 59)