n = int(input())
abc = [[2, 8], [3, 9], [7, 9]]
for i in range(n):
    x1, y1, x2, y2 = map(int, input().split())
    for j in range(3):
        if [x1, y1] == abc[j]:
            abc[j] = [x2, y2]
ans = "NO"
if abc == [[5, 8], [4, 8], [6, 8]]:
    ans = "YES"
print(ans)