P1 = 28
P2 = 39
P3 = 79

for _ in range(int(input())):
    a, b, c, d = map(int, input().split())
    x = 10*a + b
    y = 10*c + d
    if x == P1: P1 = y
    if x == P2: P2 = y
    if x == P3: P3 = y
        
print(['NO', 'YES'][P1 == 58 and P2 == 48 and P3 == 68])