#include <bits/stdc++.h>
using namespace std;

int main() {
    int A, B, C;
    cin >> A >> B >> C;

    if (A + B > C && B + C > A && A + C > B) {
        if (A != B && B != C && C != A){
            cout << "Scalene" << endl;
        }

        else if (A == B && B == C){
            cout << "Equilateral" << endl;
        }

        else if (A == B || B == C || C == A){
            cout << "Isosceles" << endl;
        }
    }

    else {
        cout << "Not a triangle" << endl;
    }

    return 0;
}