#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

struct V {
    static constexpr int N = 3;
    double inner(const V& v) const {
        double t = 0;
        for (int i = 0; i < N; i++) {
            t += x[i] * v.x[i];
        }
        return t;
    }
    V cross(const V& v) const {
        return V{
            x[1] * v.x[2] - x[2] * v.x[1],
            x[2] * v.x[0] - x[0] * v.x[2],
            x[0] * v.x[1] - x[1] * v.x[0],
        };
    }
    V& operator-=(const V& v) {
        for (int i = 0; i < N; i++) {
            x[i] -= v.x[i];
        }
        return *this;
    }
    V& operator*=(double t) {
        for (int i = 0; i < N; i++) {
            x[i] *= t;
        }
        return *this;
    }
    double& operator[](int i) {
        return x[i];
    }
    double x[N];
};

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    V v[4];
    for (int i = 0; i < 4; i++) {
        cin >> v[i][0] >> v[i][1] >> v[i][2];
    }

    for (int i = 0; i < 4; i++) {
        if (i != 2) v[i] -= v[2];
    }

    V v2 = v[0].cross(v[1]);
    V v0 = v2.cross(v[1]);
    V v1 = v2.cross(v[0]);
    v0 *= 1 / v[0].inner(v0);
    v1 *= 1 / v[1].inner(v1);

    double s0 = v[3].inner(v0);
    double s1 = v[3].inner(v1);

    cout << ((s0 + s1 < 1 && s0 > 0 && s1 > 0) ? "YES" : "NO") << endl;

    return 0;
}