The cows don't use actual bowling balls when they go bowling. They each take a number (in the range 0..99), though, and line up in a standard bowling-pin-like triangle like this:

          7



        3   8



      8   1   0



    2   7   4   4



  4   5   2   6   5

Then the other cows traverse the triangle starting from its tip and moving "down" to one of the two diagonally adjacent cows until the "bottom" row is reached. The cow's score is the sum of the numbers of the cows visited along the way. The cow with the highest score wins that frame.

Given a triangle with N (1 <= N <= 350) rows, determine the highest possible sum achievable.

The first line contains an integer giving the number of test cases. For each test case, the first line gives a single integer, N, and for 2 <= i <= N+1, line i+1 of the test case contains i space-separated integers that represent row i of the triangle.

For each test case, your output should give one line of output containing the largest sum achievable using the traversal rules

1
5
7
3 8
8 1 0
2 7 4 4
4 5 2 6 5

30

Explanation of the sample:

          7

         *

        3   8

       *

      8   1   0

       *

    2   7   4   4

       *

  4   5   2   6   5

The highest score is achievable by traversing the cows as shown above.