#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001

void dfs(vector<int> &d,vector<vector<int>> &E,int cv,int pv){
	if(pv==-1)d[cv] = 0;
	else d[cv] = d[pv] + 1;
	rep(i,E[cv].size()){
		int to  = E[cv][i];
		if(to==pv)continue;
		dfs(d,E,to,cv);
	}
}

int main(){
	
	int _t;
	cin>>_t;
	rep(_,_t){
		int n,K;
		cin>>n>>K;
		vector<vector<int>> E(n);
		rep(i,n-1){
			int x,y;
			cin>>x>>y;
			x--,y--;
			E[x].push_back(y);
			E[y].push_back(x);
		}
		vector<int> d(n);
		dfs(d,E,0,-1);
		long long cur = 0;
		rep(i,n){
			int a;
			cin>>a;
			if(d[i]%2==1){
				cur ^= a % (K+1);
				
			}
		}
		if(cur==0)cout<<"P"<<endl;
		else cout<<"K"<<endl;
	}
	
	return 0;
}