// editor1
#include<stdio.h>
void main()
{
    int a,b,c;
    scanf("%d\n%d\n%d\n",&a,&b,&c);
    if(a<=0 || b<=0 || c<=0)
    {
        printf("Invalid input");
    }
    else if(a=b=c)
    {
        printf("Equilateral");
    }
    else if(a=b || b=c || a=c)
    {
        printf("Isosceles");
    }
    else
    {
        printf("Scalene");
    }
}