Given two unsorted arrays **A** of size **N** and **B** of size **M** of distinct elements, the task is to find all pairs from both arrays whose sum is equal to **X**.

**Input:**

The first line of input contains an integer T denoting the no of test cases. Then T test cases follow. Each test case contains 3 lines . The first line contains 3 space separated integers N, M, X. Then in the next two lines are space separated values of the array A and B respectively.

**Output:**

For each test case in a new line print the sorted space separated values of all the pairs u,v where u belongs to array A and v belongs to array B, such that each pair is separated from the other by a ',' without quotes also add a space after the ',' . If no such pair exist print **-1**.

**Constraints:**

1 <= T <= 100

1 <= N, M, X <= 10^{6}

-10^{6} <= A, B <= 10^{6}

**Example:
Input:**

2

5 5 9

1 2 4 5 7

5 6 3 4 8

2 2 3

0 2

1 3

1 8, 4 5, 5 4

0 3, 2 1

**Explanation:
Testcase 1: **(1, 8), (4, 5), (5, 4) are the pairs which sum to 9.

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blackshadows | 3196 |

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