#include <bits/stdc++.h>
using namespace std;
vector<vector<pair<int, int> > > g;
vector<int> v;
void dfs(int n, int p)
{
    for(auto x : g[n])
    {
        int y = x.first, z = x.second;
        if(y != p)
        {
            v[y] = v[n] ^ z;
            dfs(y, n);
        }
    }
}
struct node
{
    int l, r, w, m;
    node *lc, *rc;
    node(int il, int ir)
    {
        l = il;
        r = ir;
        m = (l + r) / 2;
        w = 0;
        lc = nullptr;
        rc = nullptr;
    }
    void extend()
    {
        if(lc == nullptr)
        {
            lc = new node(l, m);
            rc = new node(m + 1, r);
        }
    }
    void upd(int k, int ind, int del)
    {
        w += del;
        if(ind == -1) return;
        extend();
        if((k >> ind) & 1) rc -> upd(k, ind - 1, del);
        else lc -> upd(k, ind - 1, del);
    }
    int get(int k, int ind)
    {
        if(ind == -1) return 0;
        extend();
        if(((k >> ind) & 1))
        {
            if(lc -> w > 0) return lc -> get(k, ind - 1) + (1 << ind);
            else return rc -> get(k, ind - 1);
        }
        else
        {
            if(rc -> w > 0) return rc -> get(k, ind - 1) + (1 << ind);
            else return lc -> get(k, ind - 1);
        }
    }
};
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n, q;
    cin >> n >> q;
    g.resize(n + 1);
    v.resize(n + 1);
    for(int i = 0; i < n - 1; i++)
    {
        int x, y, w;
        cin >> x >> y >> w;
        g[x].push_back({y, w});
        g[y].push_back({x, w});
    }
    dfs(1, 0);
    const int b = 300;
    vector<int> no(q);
    vector<int> act(n + 1, -1);
    vector<pair<int, int> > add;
    for(int i = 0; i < q; i++)
    {
        cin >> no[i];
        if(act[no[i]] == -1)
        {
            act[no[i]] = i;
        }
        else
        {
            add.push_back({act[no[i]], i - 1});
            act[no[i]] = -1;
        }
    }
    for(int i = 1; i <= n; i++) if(act[i] != -1) add.push_back({act[i], q - 1});
    node neu = node(0, 0);
    vector<node> trie(b, neu);
    vector<int> maxi(b);
    vector<vector<int> > ins(q);
    for(int i = 0; i < b; i++) trie[i] = node(0, (1 << 30) - 1);
    for(auto x : add)
    {
        int l = x.first, r = x.second;
        int val = no[l];
        while(l % b != 0 && l <= r)
        {
            ins[l].push_back(val);
            l++;
        }
        while(l + b - 1 <= r)
        {
            trie[l / b].upd(v[val], 29, 1);
            maxi[l / b] = max(maxi[l / b], trie[l / b].get(v[val], 29));
            l += b;
        }
        while(l <= r)
        {
            ins[l].push_back(val);
            l++;
        }
    }
    for(int i = 0; i < q; i++)
    {
        int actb = i / b;
        int ans = maxi[actb];
        for(auto x : ins[i])
        {
            trie[actb].upd(v[x], 29, 1);
            ans = max(ans, trie[actb].get(v[x], 29));
        }
        cout << ans << "\n";
        for(auto x : ins[i]) trie[actb].upd(v[x], 29, -1);
    }
    return 0;
}