N = int(input())
ls = [[2,8],[3,9],[7,9]]
for _ in range(N):
    a,b,c,d = map(int,input().split())
    for i in range(3):
        if ls[i] ==[a,b]:
            ls[i] = [c,d]
if ls == [[5,8],[4,8],[6,8]]:
    print("YES")
else:
    print("NO")