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Two Repeated Elements
     

You are given an array of N+2 integer elements. All elements of the array are in range 1 to N. And all elements occur once except two numbers which occur twice. Find the two repeating numbers.

Input:
The first line of the input contains an integer T, denoting the total number of test cases. Then T test cases follow Each test case consists of two lines. First line of each test case contains an integer N denoting the range of numbers to be inserted in array of size N+2. Second line of each test case contains the N+2 space separated integers denoting the array elements.

Output: Print the two elements occuring twice in the array. Order of the two elements must be preserved as in the original list.

Constraints:
1 ≤ T ≤ 30
1 ≤ N ≤ 100

Example:

INPUT
1

4
1 2 1 3 4 3
OUTPUT
1 3

**For More Examples Use Expected Output**


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Result:
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