from collections import deque

N, M = map(int, input().split())
ABY = [list(map(int, input().split())) + [int(input())] for _ in range(M)]

BY = [[] for _ in range(N)]
for a, b, y in ABY:
    BY[a-1].append((b-1, y))
    BY[b-1].append((a-1, y))

que = deque()
ans = [0] * N
seen = [False] * N

for i in range(N):
    if seen[i]:
        continue
    que.append(i)
    while que:
        n = que.popleft()
        for b, y in BY[n]:
            if seen[b]:
                if ans[n] ^ ans[b] != y:
                    print(-1)
                    exit()
            else:
                ans[b] = ans[n] ^ y
                seen[b] = True
                que.append(b)

print("\n".join(str(a) for a in ans))