You are given an array A containing 2*N+2 positive numbers, out of which N numbers are repeated exactly once and the other two numbers occur exactly once and are distinct. You need to find the other two numbers and print them in ascending order.

**Input :**

The first line contains a value T, which denotes the number of test cases. Then T test cases follow .The first line of each test case contains a value N. The next line contains 2*N+2 space separated integers.

**Output :**

Print in a new line the two numbers in ascending order.

**Constraints :**

1<=T<=100

1<=N<=10^6

1<=A[i]<=5*10^8

**Example:
Input :**

2

2

1 2 3 2 1 4

1

2 1 3 2

**Output :**

3 4

1 3

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