#include using namespace std; #define fs first #define sc second #define pb push_back #define mp make_pair #define eb emplace_back #define ALL(A) A.begin(),A.end() #define RALL(A) A.rbegin(),A.rend() typedef long long LL; typedef pair P; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } template T gcd(T a,T b){return b?gcd(b,a%b):a;} const LL mod=1000000007; const LL LINF=1LL<<62; const int INF=1<<30; int dx[]={1,0,-1,0,1,-1,1,-1}; int dy[]={0,1,0,-1,1,-1,-1,1}; int main(){ int n;cin >> n; map m; m[mp(2,8)]=1; m[mp(3,9)]=2; m[mp(7,9)]=3; for (int i = 0; i < n; i++) { int x,y,xx,yy;cin >> x >> y >> xx >> yy; m[mp(xx,yy)] = m[mp(x,y)]; m[mp(x,y)] = -1; } if(m[mp(5,8)] == 1 && m[mp(4,8)] == 2 && m[mp(6,8)] == 3) puts("YES"); else puts("NO"); return 0; }