N = int(input())
A = (2,8)
B = (3,9)
C = (7,9)
l = [A,B,C]
for _ in range(N):
    x,y,z,w = map(int,input().split())
    for i in range(3):
        if l[i] == (x,y):
            l[i] = (z,w)
if l[0] == (5,8) and l[1] == (4,8) and l[2] == (6,8):
    print('YES')
else:
    print('NO')