#include<stdio.h>
int main()
{
 int n1,n2,n3;
 scanf("%d %d %d",&n1,&n2,&n3);
 if(n1<0||n2<0||n3<0||n<=
 {
     printf("Invalied input");
 }
 else if(n1==n2 && n2==n3)
 {
     printf("Equilateral");
 }
 else if(n1==n2 || n2==n3 || n3==n1)
 {
     printf("Isosceles");
 }
 else
 {
     printf("Scalene");
 }
 return 0;
}