T=int(input())
for _ in range(T):
	n,k=map(int,input().split())
	e=[[] for i in range(n)]
	for i in range(n-1):
		a,b=map(int,input().split())
		a-=1
		b-=1
		e[a]+=[b]
		e[b]+=[a]
	v=[-1]*n
	v[0]=0
	q=[0]
	for s in q:
		for t in e[s]:
			if v[t]==-1:
				v[t]=v[s]^1
				q+=[t]
	g=0
	a=list(map(int,input().split()))
	for i in range(n):
		g^=(a[i]*v[i])%(k+1)
	print("PK"[g>0])