#!/usr/bin/env python3
f = {
    (2, 8): 'A',
    (3, 9): 'B',
    (7, 9): 'C',
}
g = {
    (5, 8): 'A',
    (4, 8): 'B',
    (6, 8): 'C',
}
n = int(input())
for _ in range(n):
    x1, y1, x2, y2 = map(int, input().split())
    if (x1, y1) in f:
        f[(x2, y2)] = f.pop((x1, y1))
print(['NO', 'YES'][f == g])