#[allow(unused_imports)]
use proconio::{
    input,
    marker::{Bytes, Chars, Usize1},
};

fn main() {
    input! {
        t: usize,
    }
    for _ in 0..t {
        input! {
            n: usize,
            m: usize,
        }
        let mut g = vec![vec![]; n];
        for _ in 0..n - 1 {
            input! {
                a: Usize1,
                b: Usize1,
            }
            g[a].push(b);
            g[b].push(a);
        }
        input! {
            a: [usize; n],
        }
        let mut d = vec![!0; n];
        let mut st = vec![0];
        d[0] = 0;
        while let Some(v) = st.pop() {
            for &u in &g[v] {
                if d[u] == !0 {
                    d[u] = d[v] + 1;
                    st.push(u);
                }
            }
        }
        let mut s = 0;
        for i in 0..n {
            s ^= (d[i] & 1) * (a[i] % (m + 1));
        }
        println!("{}", if s == 0 { "P" } else { "K" });
    }
}