#include<stdio.h> 
int a,b,c;
int main()
{
   int a=n1;
   int b=n2;
   int c=n3;
   int a,b,c;
   scanf("%d",& a);
   scanf("%d",& b);
   scanf("%d",& c);
   if(a==b && b==c && c==a) {
       printf("Equilateral\n");
   }else if(a==b || b==c || a==c) {
       printf("Isoceles\n");
   }else if(a<0 || b<0 || c<0) {
       printf("Invalid Input\n");
   }else{
       printf("Scalene\n");
   }
   return 0;
}