#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");
  }
  else if(a == b || b == c || a == c)
 {
   printf("Isosceles");
 }
  else
  {
   printf("Scalene");
  }
 return 0;
}o