package gg;

import java.util.Scanner;

public class CCC {

public static void main(String[] args) {
    // TODO Auto-generated method stub
    Scanner sc = new Scanner(System.in);
    int A = sc.nextInt();
    int B = sc.nextInt();
    int C = sc.nextInt();

    if (A+B+C!=180) {
        System.out.println("Error");
    }
    else if (A==60 && B==60 ) {
        System.out.println("Equilateral"); 
    }
    else if (A+B+C==180 && A!=B && B!=C && A!=C) {
        System.out.println("Scalene");
    } else if (A==B || B==C || A==C ){

        System.out.println("Isoceles");
    }

    sc.close();
}

}