import java.io.*;
import java.util.*;


public class Main_yukicoder622 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		double[] a = new double[3];
		double[] b = new double[3];
		double[] c = new double[3];
		double[] d = new double[3];

		for (int i = 0; i < 3; i++) {
			a[i] = sc.nextInt();
		}
		for (int i = 0; i < 3; i++) {
			b[i] = sc.nextInt();
		}
		for (int i = 0; i < 3; i++) {
			c[i] = sc.nextInt();
		}
		for (int i = 0; i < 3; i++) {
			d[i] = sc.nextInt();
		}

		double[] ab = v(a, b);
		double[] ac = v(a, c);

		double[] no = cross(ab, ac);

		double tmp = no[0] * (d[0] - a[0]) + no[1] * (d[1] - a[1]) + no[2] * (d[2] - a[2]);
		double tmp2 = (double)no[0] * no[0] + (double)no[1] * no[1] + (double)no[2] * no[2];
		double t = -tmp / tmp2;

		double[] p = {d[0] + t * no[0], d[1] + t * no[1], d[2] + t * no[2]};

		double[] bc = v(b, c);
		double[] ca = v(c, a);
		double[] ap = v(a, p);
		double[] bp = v(b, p);
		double[] cp = v(c, p);

		double[] bccp = cross(bc, cp);
		double[] abbp = cross(ab, bp);
		double[] caap = cross(ca, ap);

		boolean flag = true;
		if (dot(bccp, abbp) < 0) {
			flag = false;
		}

		if (dot(abbp, caap) < 0) {
			flag = false;
		}

		if (dot(caap, bccp) < 0) {
			flag = false;
		}

		if (flag) {
			pr.println("YES");
		} else {
			pr.println("NO");
		}

//		pr.printf("%f %f %f\n", no[0], no[1], no[2]);
//		pr.printf("%f %f %f\n", p[0], p[1], p[2]);
	}

	private static double dot(double[] a, double[] b) {
		return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
	}

	private static double[] v(double[] a, double[] b) {
		double[] ret = {b[0] - a[0], b[1] - a[1], b[2] - a[2]};
		return ret;
	}

	private static double[] cross(double[] a, double[] b) {
		double[] ret = {a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]};

		return ret;
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}