#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int tt;
  cin >> tt;
  while (tt--) {
    int n, k;
    cin >> n >> k;
    VVI to(n);
    rep(_, n - 1) {
      int u, v;
      cin >> u >> v;
      u--, v--;
      to[u].emplace_back(v);
      to[v].emplace_back(u);
    }
    VI a(n);
    rep(i, n) cin >> a[i];
    int g = 0;
    auto dfs = [&](auto&& self, int u, int p, int d) -> void {
      if (d) g ^= a[u] % (k + 1);
      for (int v : to[u]) if (v != p) self(self, v, u, d ^ 1);
    };
    dfs(dfs, 0, -1, 0);
    cout << "PK"[g > 0] << '\n';
  }
}