fn run<'a, F: FnMut() -> &'a str, W: std::io::Write>(scan: &mut F, writer: &mut W) {
    macro_rules! scan {
        ([$t:tt; $n:expr]) => ((0..$n).map(|_| scan!($t)).collect::<Vec<_>>());
        (($($t:tt),*)) => (($(scan!($t)),*));
        (Usize1) => (scan!(usize) - 1);
        (Bytes) => (scan().as_bytes().to_vec());
        ($t:ty) => (scan().parse::<$t>().unwrap());
    }
    macro_rules! println {
        ($($arg:tt)*) => (writeln!(writer, $($arg)*).ok());
    }

    let (n, m) = scan!((usize, usize));

    let mut graph = vec![vec![]; n];
    for _ in 0..m {
        let (a, b) = scan!((Usize1, Usize1));
        let y = scan!(u32);
        graph[a].push((b, y));
        graph[b].push((a, y));
    }

    let mut ans = vec![!0; n];
    let mut stack = Vec::new();
    for i in 0..n {
        if ans[i] < !0 { continue; }
        ans[i] = 0;
        stack.push(i);
        while let Some(from) = stack.pop() {
            let x = ans[from];
            for &(to, y) in &graph[from] {
                if ans[to] < !0 {
                    if x ^ y != ans[to] {
                        println!("-1");
                        return;
                    }
                } else {
                    ans[to] = x ^ y;
                    stack.push(to);
                }
            }
        }    
    }

    for ans in ans {
        println!("{}", ans);
    }
}

fn main() {
    let ref mut buf = Vec::new();
    std::io::Read::read_to_end(&mut std::io::stdin(), buf).ok();
    let mut scanner = unsafe {
        std::str::from_utf8_unchecked(buf).split_ascii_whitespace()
    };
    let ref mut scan = || scanner.next().unwrap();

    let stdout = std::io::stdout();
    let ref mut writer = std::io::BufWriter::new(stdout.lock());

    run(scan, writer);
}