# No.870 無敵囲い
positions = [[2, 8], [3 ,9], [7, 9]]
targets = [[5, 8], [4, 8], [6, 8]]
n = int(input())

for i in range(n):
    x1, y1, x2, y2 = [int(i) for i in input().split()]

    for m in positions:
        if m == [x1, y1]:
            positions[positions.index(m)] = [x2, y2]

print('YES' if positions == targets else 'NO')