#include <iostream>
#include <valarray>
#include <cmath>
using namespace std;

const double EPS = 1e-8;

typedef valarray<double> P;

void assign(P &p, double x, double y, double z){
	p.resize(3);
	p[0] = x;
	p[1] = y;
	p[2] = z;
}

double dot(const P &a, const P &b){
	return (a * b).sum();
}

P cross(const P &a, const P &b){
	return a.cshift(-1) * b.cshift(1) - a.cshift(1) * b.cshift(-1);
}

bool check(){
	double x, y, z;
	P pt[5];
	for(int i = 0; i < 5; ++i){
		cin >> x >> y >> z;
		assign(pt[i], x, y, z);
	}

	P n = cross(pt[3] - pt[2], pt[4] - pt[2]);
	double r = dot(pt[2] - pt[0], n);
	double s = dot(pt[1] - pt[0], n);
	if(abs(s) < EPS){ return true; }
	double t = r / s;
	if(t < -EPS || t > 1.0 + EPS){ return true; }
	P c = pt[0] * (1.0 - t) + pt[1] * t;
	P d = cross(pt[3] - pt[2], c - pt[2]);
	if(dot(d, cross(pt[4] - pt[3], c - pt[3])) < -EPS){ return true; }
	if(dot(d, cross(pt[2] - pt[4], c - pt[4])) < -EPS){ return true; }
	return false;
}

int main(){
	cout << (check() ? "HIT\n" : "MISS\n");
}