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