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

const double EPS = 1e-6;

// 计算两点距离的平方
double dist2(double x1, double y1, double x2, double y2) {
    return (x1 - x2)*(x1 - x2) + (y1 - y2)*(y1 - y2);
}

// 判断是否为三角形（任意两边之和大于第三边）
bool isTriangle(double a, double b, double c) {
    return (a + b > c + EPS) && (a + c > b + EPS) && (b + c > a + EPS);
}

int main() {
    double x1, y1, x2, y2, x3, y3;
    while (cin >> x1) {
        if (x1 == -1) break;
        cin >> y1 >> x2 >> y2 >> x3 >> y3;

        double a2 = dist2(x1, y1, x2, y2); // 边长平方
        double b2 = dist2(x2, y2, x3, y3);
        double c2 = dist2(x3, y3, x1, y1);

        double a = sqrt(a2), b = sqrt(b2), c = sqrt(c2);

        // 按边排序（a <= b <= c）
        double sides[3] = {a, b, c};
        sort(sides, sides + 3);
        a = sides[0]; b = sides[1]; c = sides[2];

        // 三角形有效性检查
        if (!isTriangle(a, b, c)) {
            cout << "Not a Triangle" << endl;
            continue;
        }

        // 边分类
        string lengthType;
        if (fabs(a - b) < 0.01 && fabs(b - c) < 0.01)
            lengthType = "Equilateral";
        else if (fabs(a - b) < 0.01 || fabs(b - c) < 0.01 || fabs(a - c) < 0.01)
            lengthType = "Isosceles";
        else
            lengthType = "Scalene";

        // 角分类（使用余弦定理或边长平方判别）
        string angleType;
        double a2_ = a * a, b2_ = b * b, c2_ = c * c;
        if (fabs(c2_ - (a2_ + b2_)) < 0.01)
            angleType = "Right";
        else if (c2_ < a2_ + b2_ - 0.01)
            angleType = "Acute";
        else
            angleType = "Obtuse";

        cout << lengthType << " " << angleType << endl;
    }
    cout << "End of Output" << endl;
    return 0;
}