// editor1
#include<stdio.h>
int main(){
 int a, b, c;
 scanf("%d %d %d",&a, &b, &c);
 
     else if(a == b && b == c){
         printf("Equilateral");
         
     }
         else if( a == b || b == c || a == c){
         printf("Isosceles");
         }
         else{
             printf("Scalene");
         }
         if(a <= 0 ||b <= 0 ||c <= 0){
     printf("Invaild Input");
     
 }
         return 0;
}