You are given an undirected tree with N nodes. Every node is initially assigned a value equal to 0.

Perform Q queries that are given on the tree as follows:

• u v w: For all the nodes present on a simple path between nodes u and v take the xor of node value with w. 

Task

Find the sum of values assigned to all the nodes after performing Q queries.

Input

• First line contains an integer T, denoting the number of test cases.
• For each test case:
  • The first line contains two space separated integer N, Q.
  • The next N - 1 lines contain two space-separated integers u, v denoting an edge between node u and node v.
  • The next Q lines contains three space-separated integers denoting the query.

Output 

For each test case in a new line, print the sum of values assigned to each node after performing Q queries.

Constraints

$1 ≤ T ≤ 5\\ 1 ≤ N, Q ≤ 10^5\\ 0 ≤ w ≤ 10^9$