n = int(input())
a = [2,8]
b = [3,9]
c = [7,9]
las_a = [5,8]
las_b = [4,8]
las_c = [6,8]
for i in range(n):
    x,y,nx,ny = map(int,input().split())
    if x == a[0] and y == a[1]:
        a[0] = nx
        a[1] = ny
    elif x == b[0] and y == b[1]:
        b[0] = nx
        b[1] = ny
    elif x == c[0] and y == c[1]:
        c[0] = nx
        c[1] = ny
    else:
        pass
if a == las_a and b == las_b and c == las_c:
    print("YES")
else:
    print("NO")