#include<stdio.h>
{
    int main()
    int a,b.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 || a==c){
                printf("Isoceles");
                else{
                    printf("Scalence");
                }
                return 0;
            }