#include<stdio.h>
int main()
{
    int a,b,c;
    scanf("%d%d%d",&a,&b,&c);
    if (a<=0||b<=0|c<=0||(a+b<=c)||(a+c<=b)||(b+c<=a))
    {
        printf("Not atriangle");
    }
    else if(a==b&&b==c)
    {
        print("Equilateral");
    }
    else if(a==b||b==c||a==c)
    {
        printf("Isoscales");
    }
    else
    {
        printf("Scalne");
    }
    return 0;
}