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, i.e., print the element which arrives first(2nd time).

**Constraints: **

1 ≤ T ≤ 30

1 ≤ N ≤ 10^{5}

**Example:**

**Input:**

2

4

1 2 1 3 4 3

5

2 4 3 1 2 7 4

**Output:**

1 3

2 4

**Explanation:
Testcase 1: **In the given array, 1 and 3 are repeated two times.

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