#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("Invalide Input");
    }
    else if(a==b && b==c)
    {
        printf("Equilateral\n");
    }
    else if(a==b || b==c || c==a)
    {
        printf("Isosceles\n");
    }
    else{
        printf("Scalene\n");
    }
    return 0;
}