#include <stdio.h>
int main()
{
    int a, int b, int c;
    scanf("%d %d %d", &a, &b, &c);
    if(a <= 0 || b <=0 || c<=0)
    {
    printf("Invalid input");}
    else if(a==b && b==c){
    printf("Equilateral");}
    else if(a==b|| b==c||c==a){
    printf("Isoscelers");}
    else{
    printf("Scalene");}
    return 0;
}