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#include <iostream>
#include <queue>
#include <vector>
#include <fstream>
using namespace std;
const int maxn = 1e5 + 10;

vector<int> graph[maxn];
int main() {
    ifstream cin("milkvisits.in");
    ofstream cout("milkvisits.out");
    int n, m;
    cin >> n >> m;
    string s;
    cin >> s;
    
    for(int i = 1; i < n; i++) {
        int a, b;
        cin >> a >> b;
        a--;
        b--;
        graph[a].push_back(b);
        graph[b].push_back(a);
    }
    vector<pair<pair<int, int>, char>> queries;
    for(int i = 0; i < m; i++) {
        int a, b;
        cin >> a >> b;
        a--; b--;
        char c;
        cin >> c;
        queries.push_back(make_pair(make_pair(a, b), c));
    }
    
    vector<int> id(n, -1);
    
    for(int i = 0; i < n; i++) {
        if(id[i] == -1) {
            queue<int> q;
            q.push(i);
            
            while(!q.empty()) {
                int node = q.front();
                q.pop();
                id[node] = i;
                for(int neighbour : graph[node]) {
                    if(id[neighbour] == -1 and s[neighbour] == s[i]) {
                        q.push(neighbour);
                    }
                }
            }
        }
    }
    string res = "";
    for(int i = 0; i < m; i++) {
        int a = queries[i].first.first;
        int b = queries[i].first.second;
        char c = queries[i].second;
        
        if(id[a] == id[b]) {
            if(s[a] == c) {
                res += "1";
            }
            else {
                res += "0";
            }
        }
        else {
            res += "1";
        }
    }
    
    cout << res << endl;
    return 0;
}