#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");
}
         printf("Isosceles");
        else printf("Scalene");       
        }
    return 0;
 }