N = int(input().strip())

lst = [(2,8), (3,9), (7,9)]

for i in range(N):
  x1, y1, x2, y2 = input().strip().split(' ')
  x1, y1, x2, y2 = int(x1), int(y1), int(x2), int(y2)
  for i in range(3):
    tmp1, tmp2 = lst[i]
    #print('lst[{}]:{} judge:{} tmp1:{} tmp2:{}'.format(i, lst[i], (tmp1 == x1) and (tmp2 == y1), tmp1, tmp2))
    if (tmp1 == x1) and (tmp2 == y1):
      lst[i] = (x2, y2)
      break
  
  #print('lst:{}'.format(lst))

if lst == [(5, 8), (4, 8), (6, 8)]:
  print('YES')
else:
  print('NO')