import java.io.*;
import java.util.*;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int t = Integer.parseInt(br.readLine());
		PrintWriter pw = new PrintWriter(System.out);
		for (int z = 0; z < t; z++) {
			String[] sa = br.readLine().split(" ");
			int n = Integer.parseInt(sa[0]);
			int k = Integer.parseInt(sa[1]);
			List<List<Integer>> list = new ArrayList<>(n);
			for (int i = 0; i < n; i++) {
				list.add(new ArrayList<>());
			}
			for (int i = 0; i < n - 1; i++) {
				sa = br.readLine().split(" ");
				int a = Integer.parseInt(sa[0]) - 1;
				int b = Integer.parseInt(sa[1]) - 1;
				list.get(a).add(b);
				list.get(b).add(a);
			}
			sa = br.readLine().split(" ");
			int[] a = new int[n];
			for (int i = 0; i < n; i++) {
				a[i] = Integer.parseInt(sa[i]);
			}

			Queue<Integer> que = new ArrayDeque<>();
			que.add(0);
			int[] d = new int[n];
			Arrays.fill(d, -1);
			d[0] = 0;
			while (!que.isEmpty()) {
				int cur = que.poll();
				for (int next : list.get(cur)) {
					if (d[next] == -1) {
						que.add(next);
						d[next] = d[cur] + 1;
					}
				}
			}

			int k1 = k + 1;
			int g = 0;
			for (int i = 0; i < n; i++) {
				if (d[i] % 2 == 1) {
					g ^= a[i] % k1;
				}
			}
			if (g == 0) {
				pw.println("P");
			} else {
				pw.println("K");
			}
		}
		pw.flush();
		br.close();
	}
}