import sys
input = sys.stdin.readline

N,M=map(int,input().split())
E=[[] for i in range(N+1)]
for i in range(M):
    a,b=map(int,input().split())
    c=int(input())
    E[a].append((b,c))
    E[b].append((a,c))

ANS=[-1]*(N+1)

for i in range(1,N+1):
    if ANS[i]==-1:
        Q=[i]
        ANS[i]=0
        
        while Q:
            x=Q.pop()

            for to,xor in E[x]:
                if ANS[to]==-1:
                    ANS[to]=ANS[x]^xor
                    Q.append(to)
                else:
                    if ANS[to]^ANS[x]!=xor:
                        print(-1)
                        sys.exit()

for i in range(1,N+1):
    if ANS[i]==-1:
        ANS[i]=0

print(*ANS[1:])