#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)
#define repe(i,a) for(auto &i:a)

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  int n;cin>>n;
  string a="28",b="39",c="79",p,m,t;
  rep(i,n){
    cin>>p>>t;p+=t;
    cin>>m>>t;m+=t;
    if(p==a)a=m;
    else if(p==b)b=m;
    else if(p==c)c=m;
  }
  //最終的に座標(5,8),(4,8),(6,8)
  cout<<(a=="58"&&b=="48"&&c=="68"?"YES":"NO")<<endl;
}