10101.cpp

#include <iostream>

using namespace std;

int main()
{
    int a,b,c;
    
    cin >>a>>b>>c;
    
    if((a+b+c)!=180)
        cout <<"Error\n";
    else if(a==b && b==c)
        cout <<"Equilateral\n";
    else if(a==b || a==c || b==c)
        cout  <<"Isosceles\n";
    else
        cout <<"Scalene\n";
    
    return 0;
    
}