import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
A=[2,8,3,9,7,9]
for _ in range(n):
  x1,y1,x2,y2=map(int,input().split())
  if A[0]==x1 and A[1]==y1:
    A[0]=x2
    A[1]=y2
  elif A[2]==x1 and A[3]==y1:
    A[2]=x2
    A[3]=y2
  elif A[4]==x1 and A[5]==y1:
    A[4]=x2
    A[5]=y2
if A==[5,8,4,8,6,8]:
  print("YES")
else:
  print("NO")