#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
using namespace std;
using ll = long long;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int t;
    cin>>t;
    while(t--){
        int n,k;
        cin>>n>>k;

        vector<vector<int>> g(n);
        rep(i,n-1){
            int x,y;
            cin>>x>>y;
            x--;y--;
            g[x].push_back(y);
            g[y].push_back(x);
        }
        vector<int> a(n);
        rep(i,n)cin>>a[i];

        vector<int> h(n,0);
        auto dfs = [&](auto dfs, int v, int p) -> void {
            for(int e: g[v]){
                if(e==p) continue;
                h[e] = h[v]+1;
                dfs(dfs, e, v);
            }
        };
        dfs(dfs, 0,-1);

        int x=0;
        rep(i,n) if(h[i]%2) x ^= a[i]%(k+1);
        if(x==0) cout << "P" << "\n";
        else cout << "K" << "\n";
    }
}