#include <bits/stdc++.h>
using namespace std;

using P = pair<int, int>;

int n, m;
vector<vector<P>> g;

vector<int> solve();

int main() {
  cin >> n >> m;
  g.resize(n);
  for (int i = 0; i < m; ++i) {
    int a, b, x;
    cin >> a >> b >> x;
    g[--a].emplace_back(--b, x);
    g[b].emplace_back(a, x);
  }
  auto res = solve();
  if (res.size())
    for (auto p : res) cout << p << endl;
  else
    cout << -1 << endl;
  return 0;
}
vector<int> solve() {
  vector<int> res(n, -1);
  queue<int> qu;
  res[0] = 0;
  qu.push(0);
  while (qu.size()) {
    int now = qu.front();
    qu.pop();
    for (auto [to, x] : g[now])
      if (res[to] < 0) {
        res[to] = x ^ res[now];
        qu.push(to);
      } else if (res[to] != (x ^ res[now]))
        return vector<int>();
  }
  for (auto &p : res)
    if (p < 0) p = 0;
  return res;
}