#include "stdafx.h"
#include <iostream>
#include <math.h>
using namespace std;

int main()
{
    int x1, y1, x2, y2, x3, y3;
    cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
    float a = sqrt(pow((x1 - x2), 2) + pow((y1 - y2), 2));
    float b = sqrt(pow((x1 - x3), 2) + pow((y1 - y3), 2));
    float c = sqrt(pow((x2 - x3), 2) + pow((y2 - y3), 2));

    bool istriangle = false;

    if ((a + b <= c) || (a + c <= b) || (c + b <= b)) {
        cout << "Not triangle" << endl;
    }
    else {
        cout << "Is triangle" << endl;
        istriangle = true;
    }
    if (istriangle) {
        if ((pow(a, 2) + pow(b, 2) == pow(c, 2)) ||
            (pow(a, 2) + pow(c, 2) == pow(b, 2)) ||
            (pow(c, 2) + pow(b, 2) == pow(a, 2))) {
            cout << " = 90";
        }
        else if ((pow(a, 2) + pow(b, 2) > pow(c, 2)) ||
            (pow(a, 2) + pow(c, 2) > pow(b, 2)) ||
            (pow(c, 2) + pow(b, 2) > pow(a, 2))) {
            cout << " < 90";
        }
        else if ((pow(a, 2) + pow(b, 2) < pow(c, 2)) ||
            (pow(a, 2) + pow(c, 2) < pow(b, 2)) ||
            (pow(c, 2) + pow(b, 2) < pow(a, 2))) {
            cout << " > 90";
        }
    }
    return 0;
}