#include<stdio.h>
int main()
{
    int a, b, c;
    scanf("%d %d %d",&a, &b, &c);
     if (a<=0 || b<=0 ||c<=0 ||a>=100||b>=100||c>=100);
     {
     printf("Invalid Input");
}
  else if(a==b && b==c)
{
printf("Equilateral\n");
}
else if(a==b || b==c || a==c);
{
printf("Isosceles\n");
}
 else {
    printf("Scalene\n");
    }
return 0;
}