백준 #10101번 삼각형 외우기

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int total = 0;
		
		if(a == b && b == c) {
			System.out.println("Equilateral");
		}else if(a + b + c == 180) {
			if(a == b || a == c || b == c) {
				System.out.println("Isosceles");
			}else {
				System.out.println("Scalene");
			}
		}else {
			System.out.println("Error");
		}
		sc.close();
	}
}