#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <string>
#include <map>
#include <set>
#include <stack>
#include <tuple>
#include <deque>
#include <array>
#include <numeric>
#include <bitset>
#include <iomanip>
#include <cassert>
#include <chrono>
#include <random>
#include <limits>
#include <iterator>
#include <functional>
#include <sstream>
#include <fstream>
#include <complex>
#include <cstring>
#include <unordered_map>
#include <unordered_set>
#include <atcoder/all>
using namespace std;
using namespace atcoder;

using ll = long long;
constexpr int INF = 1001001001;
constexpr int mod = 1000000007;
// constexpr int mod = 998244353;

template<class T>
inline bool chmax(T& x, T y){
    if(x < y){
        x = y;
        return true;
    }
    return false;
}
template<class T>
inline bool chmin(T& x, T y){
    if(x > y){
        x = y;
        return true;
    }
    return false;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int N, M;
    cin >> N >> M;
    vector<int> A(M), B(M), Y(M);
    for(int i = 0; i < M; ++i){
        cin >> A[i] >> B[i] >> Y[i];
        --A[i], --B[i];
    }

    vector<int> X(N);
    for(int k = 0; k < 30; ++k){
        two_sat ts(N);
        for(int i = 0; i < M; ++i){
            if(Y[i] >> k & 1){
                ts.add_clause(A[i], false, B[i], false);
                ts.add_clause(A[i], true, B[i], true);
            }
            else{
                ts.add_clause(A[i], false, B[i], true);
                ts.add_clause(A[i], true, B[i], false);
            }
        }
        if(!ts.satisfiable()){
            cout << -1 << endl;
            return 0;
        }
        auto sat = ts.answer();
        for(int i = 0; i < N; ++i){
            if(!sat[i])  X[i] += 1 << k;
        }
    }

    for(int i = 0; i < N; ++i)  cout << X[i] << '\n';

    return 0;
}