import sys
from sys import stdin

N,M = map(int,input().split())
ans = [1]*N

for i in range(M):
    p,q,a,b = map(int,input().split())
    assert 1 <= a*b <= 3

    p -= 1
    q -= 1
    if not ( ans[p] == a or ans[q] == b ):
        print (-1)
        sys.exit()

print (*ans)