N_28 = 28
N_39 = 39
N_79 = 79

N = int(input())

for i in range(N):
    x1, y1, x2, y2 = map(int, input().split())
    if 10*x1 + y1 == N_28:
        N_28 = 10*x2 + y2
    if 10*x1 + y1 == N_39:
        N_39 = 10*x2 + y2
    if 10*x1 + y1 == N_79:
        N_79 = 10*x2 + y2

if N_28 == 58 and N_39 == 48 and N_79 == 68:
    print("YES")
else:
    print("NO")