#include <stdio.h>
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;
}