Given an array sequence [A1 , A2 ...An], the task is to find the maximum possible sum of increasing subsequence S of length K such that Si1<=Si2<=Si3.........<=Sin.

**INPUT**

The first line contains an integer 'T' denoting the number of testcases. Then 'T' test cases follows. Each test case consists of two line containing two space separated integers 'N' and 'K' denoting the size of the array and length of the subsequence.

**OUTPUT**

Print the maximum possible sum. If their is no subsequence of length K print "-1".

**CONSTRAINTS**

1 <= T <= 100

1 <= N <= 100

1 <= a[i] <= 10^5

1 <= k <=100

**Example**

**Input**

1

8 3

8 5 9 10 5 6 19 8

**Output**

38

**Explanation**

In sample input Possible Increasing subsequence of Length 3 with maximum possible sum is 9 10 19

Author: vaibhav2992

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