import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N = int(readline())
m = map(int,read().split())
data = zip(m,m,m,m)

A = (2,8)
B = (3,9)
C = (7,9)
for x1,y1,x2,y2 in data:
    if A == (x1,y1):
        A = (x2,y2)
    if B == (x1,y1):
        B = (x2,y2)
    if C == (x1,y1):
        C = (x2,y2)

answer = 'YES' if all((A == (5,8), B == (4,8), C == (6,8))) else 'NO'
print(answer)