#include <iostream>
#include <vector>
using namespace std;

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);

    int T;
    cin >> T;
    while (T--) {
        int N, K;
        cin >> N >> K;
        vector<vector<int>> to(N);
        for (int e = 0; e < N - 1; ++e) {
            int a, b;
            cin >> a >> b;
            --a, --b;
            to.at(a).push_back(b);
            to.at(b).push_back(a);
        }
        vector<int> A(N);
        for (auto &a : A) cin >> a;

        int gru = 0;

        auto rec = [&](auto &&rec, int v, int p, int depth) -> void {
            if (depth % 2) gru ^= A.at(v) % (K + 1);

            for (auto u : to.at(v)) {
                if (u != p) rec(rec, u, v, depth + 1);
            }
        };
        rec(rec, 0, -1, 0);
        cout << (gru ? 'K' : 'P') << '\n';
    }
}