Ain = (2,8)
Bin = (3,9)
Cin = (7,9)
loc = [Ain, Bin, Cin]

Ago = (5,8)
Bgo = (4,8)
Cgo = (6,8)
goal = [Ago, Bgo, Cgo]

N = input()

S = [list(input().split()) for _ in range(N)]

for s in S:
    tar = (s[0], s[1])
    mov = (s[2], s[3])
    for i,l in enumerate(loc):
        if tar == l:
            loc[i] = mov

flag = "YES"
for i,l in enumerate(loc):
    if loc[i] != goal[i]:
        flag = "NO"
print(flag)