T = int(input())
for _ in range(T):
  N,K = map(int,input().split())
  G = [[] for i in range(N)]
  for i in range(N-1):
    u,v = map(int,input().split())
    u -= 1
    v -= 1
    G[u].append(v)
    G[v].append(u)
  A = list(map(int,input().split()))
  parent = [-1 for i in range(N)]
  todo = [0]
  dist = [-1 for i in range(N)]
  dist[0] = 0
  visit = []
  while len(todo):
    s = todo.pop()
    visit.append(s)
    for t in G[s]:
      if dist[t] == -1:
        parent[t] = s
        dist[t] = dist[s] + 1
        todo.append(t)
  while len(visit):
    s = visit.pop()
    if s == 0:
      break
    if dist[s] % 2 == 0:
      continue
    A[parent[s]] += A[s]
  g = 0
  for s in G[0]:
    g ^= A[s] % (K + 1)
  if g:
    print('K')
  else:
    print('P')