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