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