N = int(input())
xyxy = [list(map(int, input().split())) for _ in range(N)]
d = dict()
d[(2, 8)] = 'A'
d[(3, 9)] = 'B'
d[(7, 9)] = 'C'
for x1, y1, x2, y2 in xyxy:
    if (x1, y1) in d:
        d[(x2, y2)] = d[(x1, y1)]
        d[(x1, y1)] = ''
if d[(5, 8)]=='A' and d[(4, 8)]=='B' and d[(6, 8)]=='C':
    print("YES")
else:
    print("NO")