using System.Linq;
using System.Collections.Generic;
using System;

public class P
{
    public int xor { get; set; }
    public int to { get; set; }
}

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var m = int.Parse(line[1]);
        var aa = new List<P>[n];
        for (int i = 0; i < n; i++) aa[i] = new List<P>();
        var check = new int[m, 3];
        for (int i = 0; i < m; i++)
        {
            line = Console.ReadLine().Trim().Split(' ');
            var t0 = int.Parse(line[0]) - 1;
            var t1 = int.Parse(line[1]) - 1;
            var t2 = int.Parse(Console.ReadLine().Trim());
            aa[t0].Add(new P { to = t1, xor = t2 });
            aa[t1].Add(new P { to = t0, xor = t2 });
            check[i, 0] = t0;
            check[i, 1] = t1;
            check[i, 2] = t2;
        }
        getAns(n, m, aa, check);
    }
    static void getAns(int n, int m, List<P>[] aa, int[,] check)
    {
        var ans = new int[n];
        for (int i = 0; i < n; i++) ans[i] = -1;
        var q = new Queue<int>();
        for (int i = 0; i < n; i++)
        {
            if (ans[i] == -1)
            {
                ans[i] = 0;
                q.Enqueue(i);
                while (q.Count() > 0)
                {
                    var w = q.Dequeue();
                    foreach (var x in aa[w])
                    {
                        var t = ans[w] ^ x.xor;
                        if (ans[x.to] == -1) { ans[x.to] = t; q.Enqueue(x.to); }
                    }
                }
            }
        }
        var ok = true;
        for (int i = 0; i < m; i++)
        {
            if ((ans[check[i, 0]] ^ ans[check[i, 1]]) != check[i, 2])
            {
                ok = false;
                break;
            }
        }
        if (ok) Console.WriteLine(string.Join("\n", ans));
        else Console.WriteLine(-1);


    }
}