#include <stdio.h>

typedef struct Edge {
	struct Edge *next;
	int v;
} edge;

int solve(int N, int K, int X[], int Y[], int A[])
{
	int i, u, w;
	static edge *adj[200001], e[400001], *p;
	for (u = 1; u <= N; u++) adj[u] = NULL;
	for (i = 1; i < N; i++) {
		u = X[i];
		w = Y[i];
		e[i*2].v = w;
		e[i*2+1].v = u;
		e[i*2].next = adj[u];
		e[i*2+1].next = adj[w];
		adj[u] = &(e[i*2]);
		adj[w] = &(e[i*2+1]);
	}
	
	int x;
	static int depth[200001], q[200001], head, tail;
	for (u = 1; u <= N; u++) depth[u] = -1;
	depth[1] = 0;
	q[0] = 1;
	for (head = 0, tail = 1; head < tail; head++) {
		u = q[head];
		for (p = adj[u]; p != NULL; p = p->next) {
			w = p->v;
			if (depth[w] < 0) {
				depth[w] = depth[u] + 1;
				q[tail++] = w;
			}
		}
		if (depth[u] % 2 == 0) {
			for (p = adj[u], x = 0; p != NULL; p = p->next) {
				w = p->v;
				if (depth[w] > depth[u]) x ^= A[w] % (K + 1);
			}
			if (x != 0) return 1;
		}
	}
	return 0;
}

int main()
{
	int T, i, N, K, X[200001], Y[200001], A[200001];
	scanf("%d", &T);
	while (T--) {
		scanf("%d %d", &N, &K);
		for (i = 1; i < N; i++) scanf("%d %d", &(X[i]), &(Y[i]));
		for (i = 1; i <= N; i++) scanf("%d", &(A[i]));
		if (solve(N, K, X, Y, A) != 0) printf("K\n");
		else printf("P\n");
	}
	fflush(stdout);
	return 0;
}