N = int(input())

f = [[-1] * 9 for _ in range(9)]
d = []
for _ in range(N):
    x1, y1, x2, y2 = map(int, input().split())
    if f[y1 - 1][x1 - 1] == -1:
        f[y2 - 1][x2 - 1] = len(d) + 1
        d.append('{}{}'.format(x1 - 1, y1 - 1))
    else:
        f[y2 - 1][x2 - 1] = f[y1 - 1][x1 - 1]
    f[y1 - 1][x1 - 1] = 0

a = [x for x in f[7][3:6] if x > 0]
if len(a) == 3 and d[a[0] - 1] == '28' and d[a[1] - 1] == '17' and d[a[2] - 1] == '68':
    print('YES')
else:
    print('NO')