var pipe = 0;
for (var i = 0; i < str.Length; i++)
{
    if (str[i] == '|')
    {
        pipe = i;
        break;
    }
}
str = str.Substring(pipe + 1);
var x = new StringBuilder();
var y = new StringBuilder();
var maxX = -1;
var MXY = 0;
var minX = 99999;
var mXY = 0;
var maxY = -1;
var MYX = 0;
var minY = 99999;
var mYX = 0;
for (var i = 0; i < str.Length; i++)
{
    i++;
    while (str[i] != ',')
    {
        x = x.Append(str[i]);
        i++;
    }
    i++;
    while (str[i] != ')')
    {
        y = y.Append(str[i]);
        i++;
    }
    i++;
    var x1 = int.Parse(x.ToString());
    var y1 = int.Parse(y.ToString());
    x.Clear();
    y.Clear();
    if (x1 > maxX)
    {
        maxX = x1;
        MXY = y1;
    }
    if (y1 > maxY)
    {
        maxY = y1;
        MYX = x1;
    }
    if (x1 < minX)
    {
        minX = x1;
        mXY = y1;
    }
    if (y1 < minY)
    {
        minY = y1;
        mYX = x1;
    }
}
var res = "square";
if (Math.Abs(MYX - mYX) < 3 && Math.Abs(MXY - mXY) < 3)
{
    res = "cirle";
}
if (maxX == mYX || maxX == MYX || mXY == maxY || mXY == minY)
{
    res = "equilateraltriangle";
}
return res;
}