n,m = map(int,input().split())
g = [[] for _ in range(n)]
for _ in range(m):
    l,r = map(int,input().split())
    y = int(input())
    g[l-1].append((r-1,y))
    g[r-1].append((l-1,y))

res = [-1]*n
ok = 1
for i in range(n):
    if res[i] == -1:
        res[i] = 0
        st = [i]
        while st:
            v = st.pop()
            for c,d in g[v]:
                if res[c] == -1:
                    res[c] = d ^ res[v]
                    st.append(c)
                else:
                    if res[c] != d ^ res[v]:
                        ok = 0

if ok:
    print(*res,sep="\n")
else:
    print(-1)