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