Given a binary tree in which each node element contains a number. Find the maximum possible sum from one leaf node to another.

Input:
First line consists of T test cases. First line of every test case consists of N, denoting number of edges. Second line of every test case consists of N Spaced 3 elements, Parent node data, child node data and position of child node( 'L'  or  'R' ).

Output:
Return the Maximum possible sum.

Constraints:
1<=T<=100
1<=N<=30

Example:
Input:
1
12
-15 5 L -15 6 R 5 -8 L 5 1 R -8 2 L -8 -3 R 6 3 L 6 9 R 9 0 R 0 4 L 0 -1 R -1 10 L
Output:
27

** For More Input/Output Examples Use 'Expected Output' option **