#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <ctime>
#include <cassert>
#include <complex>
#include <string>
#include <cstring>
#include <chrono>
#include <random>
#include <bitset>
#include <fstream>
using namespace std;
#define int long long
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcountll
#define ll long long
#define mp make_pair
#define x first
#define y second
#define Time (double)clock()/CLOCKS_PER_SEC
#define debug(x) std::cerr << #x << ": " << x << '\n';
#define FOR(i, n) for (int i = 0; i < n; ++i)
#define pb push_back
#define trav(a, x) for (auto& a : x)
using vi = vector<int>;
template <typename T>
std::ostream& operator <<(std::ostream& output, const pair <T, T> & data)
{
    output << "(" << data.x << "," << data.y << ")";
    return output;
}
template <typename T>
std::ostream& operator <<(std::ostream& output, const std::vector<T>& data)
{
    for (const T& x : data)
        output << x << " ";
    return output;
}
ll div_up(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll div_down(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down 
ll math_mod(ll a, ll b) { return a - b * div_down(a, b); }
#define tcT template<class T
#define tcTU tcT, class U
tcT> using V = vector<T>; 
tcT> void re(V<T>& x) { 
    trav(a, x)
        cin >> a;
}
tcT> bool ckmin(T& a, const T& b) {
    return b < a ? a = b, 1 : 0; 
} // set a = min(a,b)
tcT> bool ckmax(T& a, const T& b) {
    return a < b ? a = b, 1 : 0; 
}
ll gcd(ll a, ll b) {
    while (b) {
        tie(a, b) = mp(b, a % b);
    }
    return a;
}
const int N = 1e5+7;
int n, m;
int a[N], b[N], sum[N];
vi g[N];
int comp[N];
bool used[N];
int col[N];
void dfs(int u, int c) {
    comp[u] = c;
    used[u] = 1;
    trav (v, g[u])
        if (!used[v])
            dfs(v, c);
}
void color(int u) {
    used[u] = 1;
    trav (v, g[u]) {
        if (!used[v]) {
            col[v] = col[u] ^ 1;
            color(v);
        }
    }
}

int ans[N];

signed main() {
    #ifdef ONLINE_JUDGE
    #define endl '\n'
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif
    cin >> n >> m;
    FOR (i, m) {
        cin >> a[i] >> b[i] >> sum[i];
    }
    FOR (bit, 30) {
        for (int i = 1; i <= n; ++i)
            g[i].clear();
        FOR (i, m) {
            if ((sum[i] >> bit) & 1) {

            }
            else {
                g[a[i]].app(b[i]);
                g[b[i]].app(a[i]);
            }
        }
        memset(used, 0, sizeof used);
        int p = 0;
        for (int i = 1; i <= n; ++i) {
            if (!used[i]) {
                dfs(i, p);
                p++;
            }
        }
        FOR (i, p) 
            g[i].clear();
        FOR (i, m) {
            if ((sum[i] >> bit) & 1) {
                int u = comp[a[i]], v = comp[b[i]];
                g[u].app(v);
                g[v].app(u);
            }
        }
        memset(used, 0, sizeof used);
        FOR (i, p) {
            if (!used[i]) {
                color(i);
            }
        }
        FOR (i, m) {
            if ((sum[i] >> bit) & 1) {
                int u = comp[a[i]], v = comp[b[i]];
                if (col[u] == col[v]) {
                    cout << -1 << endl;
                    exit(0);
                }
            }
        }
        for (int i = 1; i <= n; ++i) {
            if (col[comp[i]]) {
                ans[i] += 1ll << bit;
            }
        }
    }
    for (int i = 1; i <= n; ++i) {
        cout << ans[i] << endl;
    }
}