#include <bits/stdc++.h>
//#include<boost/multiprecision/cpp_int.hpp>
//#include<boost/multiprecision/cpp_dec_float.hpp>
//#include <atcoder/all>
#define rep(i, a) for (int i = (int)0; i < (int)a; ++i)
#define rrep(i, a) for (int i = (int)a - 1; i >= 0; --i)
#define REP(i, a, b) for (int i = (int)a; i < (int)b; ++i)
#define RREP(i, a, b) for (int i = (int)a - 1; i >= b; --i)
#define repl(i, a) for (ll i = (ll)0; i < (ll)a; ++i)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define popcount __builtin_popcount
#define fi first
#define se second
using ll = long long;
constexpr ll mod = 1e9 + 7;
constexpr ll mod_998244353 = 998244353;
constexpr ll INF = 1LL << 60;

// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")

//using lll=boost::multiprecision::cpp_int;
//using Double=boost::multiprecision::number<boost::multiprecision::cpp_dec_float<1024>>;//仮数部が1024桁
template <class T>
inline bool chmin(T &a, T b)
{
	if (a > b)
	{
		a = b;
		return true;
	}
	return false;
}
template <class T>
inline bool chmax(T &a, T b)
{
	if (a < b)
	{
		a = b;
		return true;
	}
	return false;
}

template <typename T>
T mypow(T x, T n, const T &p = -1)
{ //x^nをmodで割った余り

	if (p != -1)
	{
		x %= p;
	}
	T ret = 1;
	while (n > 0)
	{
		if (n & 1)
		{
			if (p != -1)
				ret = (ret * x) % p;
			else
				ret *= x;
		}
		if (p != -1)
			x = (x * x) % p;
		else
			x *= x;
		n >>= 1;
	}
	return ret;
}

using namespace std;
//using namespace atcoder;

void solve()
{	
	vector<double>x(4),y(4),z(4);
	rep(i,4)cin>>x[i]>>y[i]>>z[i];
	auto func=[](const vector<double>&x,double val)->double{
		return (x[2]-x[0])*(x[3]-val*x[2]);
	};
	auto func2=[](const vector<double>&x)->double{
		return (x[2]-x[0])*x[1];
	};
	double div=func2(x)+func2(y)+func2(z);
	auto trinity=[&x,&y,&z,div,func](double val)->double{
		double res=0;
		res=func(x,val)+func(y,val)+func(z,val);
		res/=div;
	};
	
	if(!div){
		cout<<"NO\n";
		return;
	}
	double l=0,r=1;
	rep(i,500){
		double lx=(l*2+r)/3,rx=(l+r*2)/3;
		if(abs(trinity(lx)-0.5)>=abs(trinity(rx)-0.5)){
			l=lx;
		}else{
			r=rx;
		}
	}

	double s=trinity(l),t=trinity(r);
	if(0<=s&&s<=1&&0<=s+l&&s+l<=1){
		cout<<"YES\n";
	}else if(0<=t&&t<=1&&0<=t+r&&t+r<=1){
		cout<<"YES\n";
	}else{
		cout<<"NO\n";
	}
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cout << fixed << setprecision(15);
	solve();
	return 0;
}