n = int(input())
pos = [[2, 8], [3, 9], [7, 9]]
for _ in range(n):
    x1, y1, x2, y2 = map(int, input().split())
    if [x1, y1] in pos:
        print([x1, y1])
        ind = pos.index([x1, y1])
        pos[ind]  =[x2, y2]
if pos == [[5, 8], [4, 8], [6, 8]]:
    print("YES")
else:
    print("NO")