n = int(input())

target_list = [[2, 8], [3, 9], [7, 9]]

for i in range(n):
    x1, y1, x2, y2 =[int(i) for i in input().split()]
    
    for j in range(3):
        if x1 == target_list[j][0] and y1 == target_list[j][1]:
            target_list[j][0] = x2
            target_list[j][1] = y2
            break
            
if target_list == [[5, 8], [4, 8], [6, 8]]:
    print('YES')
else:
    print('NO')