n = int(input())
a = [2,8]
b = [3,9]
c = [7,9]
for _ in range(n):
    x1, y1, x2, y2 = map(int,input().split())
    if a == [x1, y1]:
        a = [x2, y2]
    elif b == [x1, y1]:
        b = [x2, y2]
    elif c == [x1, y1]:
        c = [x2, y2]
if a == [5,8] and b == [4,8] and c == [6,8]:
    print('YES')
else:
    print('NO')