N = int(input())
A = "2 8"
B = "3 9"
C = "7 9"

for i in range(N):
    S =input()
    if A == S[:3]:
        A = S[4:]
    if B == S[:3]:
        B = S[4:]
    if C == S[:3]:
        C = S[4:]

if A == "5 8" and B == "4 8" and C == "6 8":
    print("YES")
else:
    print("NO")