x=[[2,8],[3,9],[7,9]]
for i in range(int(input())):
    a,b,c,d=map(int,input().split())
    for i in range(3):
        if [a,b]==x[i]:x[i]=[c,d]
print("YES"if x==[[5,8],[4,8],[6,8]]else"NO")