#include <complex>
#include <cmath>
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
const double EPS = 1e-7;
struct P{
	double x,y,z;
	P(double x,double y,double z) : x(x) , y(y) , z(z) {}
	P(){}
};
P operator + (P a,P b){
	a.x += b.x;
	a.y += b.y;
	a.z += b.z;
	return a;
}
P operator - (P a,P b){
	a.x -= b.x;
	a.y -= b.y;
	a.z -= b.z;
	return a;
}
double abs(P a){
	return sqrt(a.x * a.x + a.y * a.y + a.z * a.z);
}
double det(vector< vector<double> > A){
	double ans = 1;
	for(int i = 0 ; i < A.size() ; i++){
		for(int j = i+1 ; j < A.size() ; j++){
			if( A[i][i] == 0 && A[j][i] != 0 ){
				swap(A[i],A[j]);
				ans *= -1;
				break;
			}
		}
		if( abs(A[i][i]) < 1e-9 ) return 0;
		ans *= A[i][i];
		for(int j = i+1 ; j < A.size() ; j++){
			for(int k = A.size()-1 ; k >= i ; k--){
				A[j][k] -= A[i][k] * A[j][i] / A[i][i];
			}
		}
	}
	return ans;
}

P calc(double k,P a){
	a.x *= k;
	a.y *= k;
	a.z *= k;
	return a;
}
double area(P a,P b,P c){
	b = b-a;
	c = c-a;
	double x = det({{b.y,b.z},{c.y,c.z}});
	double y = det({{b.z,b.x},{c.z,c.x}});
	double z = det({{b.x,b.y},{c.x,c.y}});
	return sqrt(x*x+y*y+z*z);
}
int main(){
	P uaz,ene,a,b,c;
	P vec;
	cin >> uaz.x >> uaz.y >> uaz.z;
	cin >> ene.x >> ene.y >> ene.z;
	cin >> a.x >> a.y >> a.z;
	cin >> b.x >> b.y >> b.z;
	cin >> c.x >> c.y >> c.z;
	
	uaz = uaz - a;
	ene = ene - a;
	b = b - a;
	c = c - a;
	a = a - a;
	vec = ene - uaz;
	double s = abs(vec);
	vec.x /= s;
	vec.y /= s;
	vec.z /= s;
	double l = -1000000 , r = 1000000;
	for( int _ = 0 ; _ < 128 ; _++ ){
		double m = (l+r) / 2.0;
		P pos1 = calc(m,vec) + uaz;
		P pos2 = calc(r,vec) + uaz;
		double D1 = det({{b.x,b.y,b.z},{c.x,c.y,c.z},{pos1.x,pos1.y,pos1.z}});
		double D2 = det({{b.x,b.y,b.z},{c.x,c.y,c.z},{pos2.x,pos2.y,pos2.z}});
		if( D1 * D2 > 0  ){
			r = m;
		}else{
			l = m;
		}
	}
	P hit = calc(l,vec) + uaz;
	//cout << fabs(abs(uaz-hit)-l) << endl;
	//while( abs(det({{b.x,b.y,b.z},{c.x,c.y,c.z},{hit.x,hit.y,hit.z}})) > EPS ){}
	//cout << hit.x << " " << hit.y << " " << hit.z << endl;
	if( l > EPS && fabs(abs(uaz-hit)-l)<EPS && fabs( abs(ene-hit) - (s-l) ) < EPS  ){
		double all = 0;
		int qq = 0;
		for(int k = 0 ; k < 1000000 ; k++)
			if(k%3==0&&k*(k+1)%2==0)qq++,qq%=k,all = area(a,b,c);
		int bb = 2*qq;
		if(bb){qq^=1;}
		all = area(a,b,c);
		double sub1 = area(a,b,hit);
		double sub2 = area(b,c,hit);
		double sub3 = area(c,a,hit);
		//cout << all << " " <<  sub1 + sub2 + sub3 << endl;
		if( fabs( all-(sub1+sub2+sub3) ) < EPS ){
			cout << "MISS" << endl;
		}else{
			cout << "HIT" << endl;
		}
	}else{
		cout << "HIT" << endl;
	}
	
	
}