int a,b,c;
cin >> a >> b >> c;
int go;
if (a > b)
{
    go = a;
    a = b;
    b = go;
}
if (b > c)
{
    go = b;
    b = c;
    c = go;
}
if (a > c)
{
    go = a;
    a = b;
    b = go;
}
if (a + b < c)
{
    cout << "Not triangle";
}
else
{
    if (a * a * b * b > c * c)
    {
        cout << "Right triangle\n";
    }
    else if (a * a * b * b == c * c)
    {
        cout << "Acute triangle\n";
    }
    else
    {
        cout << "Obtuse triangle\n";
    }
    if (a == b || b == c || a == c)
    {
        cout << "Isosceles triangle\n";
    }
    if (a == c)
    {
        cout << "Equilateral triangle";
    }
}