import sys
input = sys.stdin.readline

T=int(input())
for tests in range(T):
    N,K=map(int,input().split())

    E=[[] for i in range(N)]

    for i in range(N-1):
        x,y=map(int,input().split())
        x-=1
        y-=1

        E[x].append(y)
        E[y].append(x)

    A=list(map(int,input().split()))

    DIS=[-1]*N
    DIS[0]=0
    Q=[0]
    while Q:
        x=Q.pop()
        for to in E[x]:
            if DIS[to]==-1:
                DIS[to]=DIS[x]+1
                Q.append(to)

    XOR=0

    for i in range(N):
        if DIS[i]%2==1:
            XOR^=(A[i]%(K+1))

    if XOR!=0:
        print("K")
    else:
        print("P")