/**
	author:  shobonvip
	created: 2025.01.17 21:55:38
**/

#include<bits/stdc++.h>
using namespace std;

//* ATCODER
#include<atcoder/all>
using namespace atcoder;
typedef modint998244353 mint;
//*/

/* BOOST MULTIPRECISION
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
//*/

typedef long long ll;

#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)
#define all(v) v.begin(), v.end()

template <typename T> bool chmin(T &a, const T &b) {
	if (a <= b) return false;
	a = b;
	return true;
}

template <typename T> bool chmax(T &a, const T &b) {
	if (a >= b) return false;
	a = b;
	return true;
}

template <typename T> T max(vector<T> &a){
	assert(!a.empty());
	T ret = a[0];
	for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]);
	return ret;
}

template <typename T> T min(vector<T> &a){
	assert(!a.empty());
	T ret = a[0];
	for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]);
	return ret;
}

template <typename T> T sum(vector<T> &a){
	T ret = 0;
	for (int i=0; i<(int)a.size(); i++) ret += a[i];
	return ret;
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	ll p,q;
	ll a,x;
	ll b,y;
	ll c,z;
	cin>>p>>q>>a>>x>>b>>y>>c>>z;
	a-=p;b-=p;c-=p;
	x-=q;y-=q;z-=q;
	//https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q11145651356
	if(a*y*z*(y-z)+b*x*z*(z-x)*c*x*y*(x-y)==x*b*c*(b-c)+y*c*a*(c-a)+z*a*b*(a-b)){
		cout<<"YES\n";
	}else{
		cout<<"NO\n";
	}
}