import sys
input = sys.stdin.readline

def solve(N, K, E, A):
    G = [[] for _ in [0] * N]
    for x, y in E:
        G[x].append(y)
        G[y].append(x)
    D = [-1] * N
    D[0] = 0
    S = [0]
    while(S):
        x = S.pop()
        y = D[x]
        for nx in G[x]:
            if(D[nx] >= 0):
                continue
            ny = y ^ 1
            D[nx] = ny
            S.append(nx)
    grundy = 0
    for x in [v for v in range(N) if(D[v] == 1)]:
        grundy ^= A[x] % (K + 1)
    if(grundy):
        return 'K'
    return 'P'

t = int(input())
for _ in [0] * t:
    N, K = map(int, input().split())
    E = [[x - 1 for x in map(int, input().split())] for _ in [0] * (N - 1)]
    A = list(map(int, input().split()))
    print(solve(N, K, E, A))