n = int(input())

a, b = 2, 8
c, d = 3, 9
e, f = 7, 9

for i in range(n):
    x1, y1, x2, y2 = map(int, input().split())
    if a == x1 and b == y1:
        a, b = x2, y2
    elif c == x1 and d == y1:
        c, d = x2, y2
    elif e == x1 and f == y1:
        e, f = x2, y2
if (a == 5 and b == 8) and (c == 4 and d == 8) and (e == 6 and f == 8):
    print('YES')
else:
    print('NO')